1 00:00:04,789 --> 00:00:01,910 so over the years I've encountered a 2 00:00:06,980 --> 00:00:04,799 number of people who had a lot of new 3 00:00:10,490 --> 00:00:06,990 sorts of theories cosmological models 4 00:00:14,570 --> 00:00:10,500 physical models models that replace 5 00:00:16,160 --> 00:00:14,580 relativity like various sorts of 6 00:00:18,890 --> 00:00:16,170 interesting ideas and I'm not sure what 7 00:00:21,170 --> 00:00:18,900 to do with them if and they often they 8 00:00:23,420 --> 00:00:21,180 say that they're right and Einstein is 9 00:00:25,939 --> 00:00:23,430 wrong or something like that you know 10 00:00:29,150 --> 00:00:25,949 that that sort of category I started 11 00:00:31,790 --> 00:00:29,160 preparing this talk literally 40 years 12 00:00:33,889 --> 00:00:31,800 ago when I was an undergraduate and I 13 00:00:37,010 --> 00:00:33,899 was taking my initial physics classes 14 00:00:40,040 --> 00:00:37,020 and I remember learning about Newtonian 15 00:00:41,630 --> 00:00:40,050 physics and you in Newtonian physics we 16 00:00:44,540 --> 00:00:41,640 learned that force equals mass times 17 00:00:48,170 --> 00:00:44,550 acceleration so if you push something it 18 00:00:50,690 --> 00:00:48,180 moves we know that then I learned a 19 00:00:52,490 --> 00:00:50,700 completely different formulation for the 20 00:00:54,799 --> 00:00:52,500 same sort of thing and that is 21 00:00:58,279 --> 00:00:54,809 Hamilton's principle which is behind 22 00:01:01,760 --> 00:00:58,289 Lagrangian dynamics and that says that a 23 00:01:04,280 --> 00:01:01,770 system follows a path in which the 24 00:01:06,740 --> 00:01:04,290 difference between the kinetic energy 25 00:01:07,969 --> 00:01:06,750 and the potential energy is minimized 26 00:01:11,990 --> 00:01:07,979 it's called the principle of least 27 00:01:15,410 --> 00:01:12,000 action and both of these approaches give 28 00:01:16,730 --> 00:01:15,420 you exactly the same answer and so this 29 00:01:18,230 --> 00:01:16,740 was this was mind-blowing 30 00:01:21,679 --> 00:01:18,240 there's there's a way of looking at the 31 00:01:23,090 --> 00:01:21,689 universe where there's a principle and 32 00:01:27,310 --> 00:01:23,100 there's a way of looking at the universe 33 00:01:32,810 --> 00:01:27,320 where there's a process very interesting 34 00:01:36,200 --> 00:01:32,820 also other Newtonian laws or things that 35 00:01:38,390 --> 00:01:36,210 evolved from Newtonian laws can be 36 00:01:40,340 --> 00:01:38,400 matched with conservation laws so we've 37 00:01:42,620 --> 00:01:40,350 got the conservation of energy and the 38 00:01:45,590 --> 00:01:42,630 conservation of momentum again a 39 00:01:48,980 --> 00:01:45,600 principle conservation versus a process 40 00:01:51,499 --> 00:01:48,990 so the world seems to be divided so far 41 00:01:54,499 --> 00:01:51,509 into principle and process let's keep 42 00:01:57,410 --> 00:01:54,509 going in optics we learn Fermat's 43 00:01:59,719 --> 00:01:57,420 principle so Fermat's principle says 44 00:02:01,580 --> 00:01:59,729 that light takes the path of least time 45 00:02:05,569 --> 00:02:01,590 so if we're looking at a fish in a pond 46 00:02:07,490 --> 00:02:05,579 the path that the light takes makes a 47 00:02:09,240 --> 00:02:07,500 bend because light travels faster 48 00:02:12,570 --> 00:02:09,250 through air than through the higher 49 00:02:14,160 --> 00:02:12,580 index medium of the water and so we can 50 00:02:15,540 --> 00:02:14,170 tell the path that way but there's 51 00:02:18,000 --> 00:02:15,550 another way of looking at it and that's 52 00:02:20,280 --> 00:02:18,010 through Snell's law which tells us that 53 00:02:23,820 --> 00:02:20,290 at the shift of index of refraction 54 00:02:25,680 --> 00:02:23,830 there's going to be a bend and so on and 55 00:02:28,740 --> 00:02:25,690 so on and this is you can base this on 56 00:02:30,060 --> 00:02:28,750 phase matching conditions and so on so 57 00:02:33,960 --> 00:02:30,070 again there is sort of this principle 58 00:02:37,380 --> 00:02:33,970 and then there's a process let's see is 59 00:02:40,470 --> 00:02:37,390 there more before I do actually which 60 00:02:43,229 --> 00:02:40,480 one do you feel better with how many of 61 00:02:45,000 --> 00:02:43,239 you prefer looking at the general 62 00:02:47,880 --> 00:02:45,010 principle in order to understand 63 00:02:50,310 --> 00:02:47,890 something and how many of you prefer 64 00:02:52,080 --> 00:02:50,320 looking at the process examples to 65 00:02:55,350 --> 00:02:52,090 understand something okay we're almost 66 00:02:57,030 --> 00:02:55,360 evenly divided okay let's take a look at 67 00:02:59,870 --> 00:02:57,040 thermodynamics and I've got three 68 00:03:02,820 --> 00:02:59,880 examples from thermodynamics one 69 00:03:03,990 --> 00:03:02,830 involves how system evolves in time and 70 00:03:07,020 --> 00:03:04,000 we know from the second law of 71 00:03:09,960 --> 00:03:07,030 thermodynamics that the entropy must be 72 00:03:12,479 --> 00:03:09,970 maximized so system moves to a position 73 00:03:15,449 --> 00:03:12,489 where the number of options that that 74 00:03:16,830 --> 00:03:15,459 system has is maximized there's another 75 00:03:19,289 --> 00:03:16,840 way of looking at that and that is 76 00:03:22,259 --> 00:03:19,299 through the microscopic interactions if 77 00:03:25,080 --> 00:03:22,269 you put a bag into a hot water a tea bag 78 00:03:28,140 --> 00:03:25,090 that particles diffuse or it diffuse out 79 00:03:30,090 --> 00:03:28,150 and you can look through particle by 80 00:03:32,070 --> 00:03:30,100 particle what happens and eventually the 81 00:03:35,270 --> 00:03:32,080 tea gets distributed fully and the 82 00:03:38,400 --> 00:03:35,280 entropy is maximized principle process a 83 00:03:41,009 --> 00:03:38,410 second thermodynamics concept let's take 84 00:03:45,080 --> 00:03:41,019 a look at a system at rest so we know 85 00:03:48,840 --> 00:03:45,090 that if we have for example a reactant 86 00:03:52,170 --> 00:03:48,850 and a product that eventually they 87 00:03:53,610 --> 00:03:52,180 equalize they stabilize and so at that 88 00:03:54,990 --> 00:03:53,620 point you can say the system is at 89 00:03:57,180 --> 00:03:55,000 equilibrium 90 00:03:59,240 --> 00:03:57,190 what's constant the temperature the 91 00:04:02,370 --> 00:03:59,250 pressure the chemical a tallulah briam 92 00:04:04,229 --> 00:04:02,380 we can also look at this from a 93 00:04:06,170 --> 00:04:04,239 different point of view and that is an 94 00:04:08,789 --> 00:04:06,180 active process this was initially 95 00:04:11,280 --> 00:04:08,799 developed by Einstein among others and 96 00:04:13,290 --> 00:04:11,290 that says that each process is 97 00:04:15,360 --> 00:04:13,300 dynamically balanced by its 98 00:04:17,940 --> 00:04:15,370 verse in other words there's constant 99 00:04:19,979 --> 00:04:17,950 motion from the product to the reactant 100 00:04:22,020 --> 00:04:19,989 and back and forth both of these 101 00:04:24,750 --> 00:04:22,030 describe the same thing principle 102 00:04:27,150 --> 00:04:24,760 process third thermodynamics example 103 00:04:29,610 --> 00:04:27,160 heat from friction we know that if we 104 00:04:31,950 --> 00:04:29,620 rub one stick against another that the 105 00:04:34,620 --> 00:04:31,960 the kinetic energy that we've put into 106 00:04:36,480 --> 00:04:34,630 the sticks is going to eventually end up 107 00:04:38,730 --> 00:04:36,490 as heat energy and so there's a 108 00:04:40,890 --> 00:04:38,740 conservation of energy we can balance 109 00:04:42,660 --> 00:04:40,900 that by another view and that is looking 110 00:04:44,550 --> 00:04:42,670 at the microscopic interactions when you 111 00:04:46,770 --> 00:04:44,560 rub one stick against another one 112 00:04:48,780 --> 00:04:46,780 molecule causes another molecule to 113 00:04:53,100 --> 00:04:48,790 vibrate the vibrations produce heat and 114 00:04:56,720 --> 00:04:53,110 so on electro magnetics so we know that 115 00:05:01,740 --> 00:04:56,730 current produces a magnetic field 116 00:05:03,560 --> 00:05:01,750 Maxwell observed electromagnetic 117 00:05:05,820 --> 00:05:03,570 interactions for a long time and very 118 00:05:07,740 --> 00:05:05,830 carefully codified them into a long 119 00:05:09,570 --> 00:05:07,750 series of equations which were 120 00:05:13,170 --> 00:05:09,580 eventually reduced to Maxwell's four 121 00:05:15,360 --> 00:05:13,180 equations one of these is amperes law 122 00:05:18,300 --> 00:05:15,370 which I'm shown here and in particular 123 00:05:22,070 --> 00:05:18,310 I've boxed the equation that says the 124 00:05:24,210 --> 00:05:22,080 curl of the magnetic field B is equal to 125 00:05:26,850 --> 00:05:24,220 something that's related to the current 126 00:05:29,400 --> 00:05:26,860 so what this is saying is that if you 127 00:05:30,990 --> 00:05:29,410 pass current through a wire it produces 128 00:05:33,480 --> 00:05:31,000 a magnetic field and the picture shows 129 00:05:35,060 --> 00:05:33,490 that if you've got two wires in which 130 00:05:37,800 --> 00:05:35,070 you're passing current through them 131 00:05:39,810 --> 00:05:37,810 those magnetic fields interact and the 132 00:05:44,490 --> 00:05:39,820 wires can either attract or repel each 133 00:05:46,020 --> 00:05:44,500 other let's take a look at an other way 134 00:05:49,560 --> 00:05:46,030 of looking at this and that is 135 00:05:51,630 --> 00:05:49,570 electrostatics and special relativity so 136 00:05:54,690 --> 00:05:51,640 if you take a look at just a wire in the 137 00:05:57,360 --> 00:05:54,700 top picture here you can see that we've 138 00:06:00,450 --> 00:05:57,370 got electrons in the wire in the metal 139 00:06:02,340 --> 00:06:00,460 and they're balanced by the ionic cores 140 00:06:04,770 --> 00:06:02,350 which are the positive charges and so 141 00:06:07,440 --> 00:06:04,780 everything's neutral but we also know 142 00:06:10,650 --> 00:06:07,450 from special relativity that when things 143 00:06:13,380 --> 00:06:10,660 move they tend to contract that's 144 00:06:16,310 --> 00:06:13,390 Lorentz contraction or they appear to 145 00:06:19,470 --> 00:06:16,320 contract from a stationary observer and 146 00:06:21,870 --> 00:06:19,480 so if you look at this wire while the 147 00:06:23,790 --> 00:06:21,880 electrons are moving it appears that the 148 00:06:26,610 --> 00:06:23,800 elect that the electrons are in higher 149 00:06:26,820 --> 00:06:26,620 density because the the electrons and 150 00:06:34,350 --> 00:06:26,830 the 151 00:06:36,870 --> 00:06:34,360 that wire becomes not electrically 152 00:06:39,990 --> 00:06:36,880 neutral if you're looking at it the 153 00:06:42,540 --> 00:06:40,000 right way then if you have another wire 154 00:06:45,510 --> 00:06:42,550 that's adjacent to it that's also para 155 00:06:48,630 --> 00:06:45,520 passing a current those two wires will 156 00:06:50,730 --> 00:06:48,640 appear to each other to be non net non 157 00:06:52,770 --> 00:06:50,740 neutral and so there can either be 158 00:06:54,540 --> 00:06:52,780 repulsion or contraction due to special 159 00:06:57,000 --> 00:06:54,550 relativity this was a particularly 160 00:06:59,220 --> 00:06:57,010 interesting one for me and I went to a 161 00:07:00,390 --> 00:06:59,230 fellow in my department who's an electro 162 00:07:03,090 --> 00:07:00,400 magnetics theorist 163 00:07:07,040 --> 00:07:03,100 really a brilliant guy and I was talking 164 00:07:09,570 --> 00:07:07,050 to him about how you can derive a 165 00:07:11,790 --> 00:07:09,580 magnetism which is not one of the four 166 00:07:15,930 --> 00:07:11,800 basic forces how you can derive it from 167 00:07:17,640 --> 00:07:15,940 relativity and he was very puzzled and I 168 00:07:19,170 --> 00:07:17,650 said well where do you think magnetism 169 00:07:22,620 --> 00:07:19,180 comes from and he said for Maxwell's 170 00:07:24,450 --> 00:07:22,630 equations and I said but relativity 171 00:07:26,480 --> 00:07:24,460 explains it and he said no relativity 172 00:07:29,100 --> 00:07:26,490 comes from Maxwell's equations also I 173 00:07:33,380 --> 00:07:29,110 was flabbergasted but that really is 174 00:07:36,810 --> 00:07:33,390 another legitimate view so we have the 175 00:07:38,370 --> 00:07:36,820 principle view in the process view let's 176 00:07:40,650 --> 00:07:38,380 take a look again this one's a little 177 00:07:42,680 --> 00:07:40,660 more subtle and I'll go through it it's 178 00:07:45,420 --> 00:07:42,690 really for specialists but we know that 179 00:07:47,370 --> 00:07:45,430 semiconductors have electrons that it 180 00:07:49,290 --> 00:07:47,380 can exist at various levels they can 181 00:07:51,540 --> 00:07:49,300 exist in what's called a conduction band 182 00:07:53,280 --> 00:07:51,550 they can exist in a valence band and 183 00:07:55,860 --> 00:07:53,290 they cannot exist in the forbidden gap 184 00:07:58,170 --> 00:07:55,870 and silicon is an example of this all 185 00:07:59,760 --> 00:07:58,180 the electronics that we work on is based 186 00:08:02,850 --> 00:07:59,770 upon the fact that there's a forbidden 187 00:08:05,400 --> 00:08:02,860 gap in energy so where does that come 188 00:08:07,980 --> 00:08:05,410 from well as a student I learned that 189 00:08:11,550 --> 00:08:07,990 there's actually a periodic potential in 190 00:08:13,890 --> 00:08:11,560 a material and that so you can view the 191 00:08:17,340 --> 00:08:13,900 red dots as being the ionic cores and 192 00:08:19,380 --> 00:08:17,350 you can simplify that with the Green 193 00:08:22,440 --> 00:08:19,390 Line saying that there's sort of a step 194 00:08:24,420 --> 00:08:22,450 function periodic potential and so when 195 00:08:25,950 --> 00:08:24,430 the electron is traveling through the 196 00:08:28,560 --> 00:08:25,960 semiconductor it has a certain 197 00:08:31,050 --> 00:08:28,570 wavelength associated with it when that 198 00:08:34,500 --> 00:08:31,060 wavelength is such that it keeps on 199 00:08:35,800 --> 00:08:34,510 hitting these barrier walls the electron 200 00:08:39,430 --> 00:08:35,810 says I'm fed up I'm not going 201 00:08:42,040 --> 00:08:39,440 it reflects therefore that electron is 202 00:08:44,019 --> 00:08:42,050 encountering the forbidden gap if the 203 00:08:46,480 --> 00:08:44,029 electron has more energy shorter 204 00:08:48,580 --> 00:08:46,490 wavelength or less energy longer 205 00:08:50,500 --> 00:08:48,590 wavelength it doesn't in kit encounter 206 00:08:53,530 --> 00:08:50,510 this periodic potential in the same way 207 00:08:55,329 --> 00:08:53,540 and so from the periodic potential we 208 00:08:58,180 --> 00:08:55,339 can derive a band gap it's sort of a 209 00:08:59,620 --> 00:08:58,190 Fourier transform approach then I 210 00:09:01,960 --> 00:08:59,630 learned another thing in solid-state 211 00:09:03,910 --> 00:09:01,970 physics and this is a complicated 212 00:09:06,400 --> 00:09:03,920 diagram so bear with me let's just start 213 00:09:09,280 --> 00:09:06,410 on the right hand side so this shows 214 00:09:12,430 --> 00:09:09,290 energy and it's an atom and we know that 215 00:09:14,380 --> 00:09:12,440 an atom has electronic orbitals the red 216 00:09:16,900 --> 00:09:14,390 line the blue line the orange line and 217 00:09:19,810 --> 00:09:16,910 these orbital energies for the electron 218 00:09:22,060 --> 00:09:19,820 are discrete now take the atoms and 219 00:09:25,510 --> 00:09:22,070 start smashing them together as you 220 00:09:27,460 --> 00:09:25,520 squeeze them together they encounter the 221 00:09:31,360 --> 00:09:27,470 poly exclusion principle which says that 222 00:09:32,980 --> 00:09:31,370 you cannot have anything in exactly the 223 00:09:36,310 --> 00:09:32,990 same state at the same place at the same 224 00:09:38,769 --> 00:09:36,320 time so the electrons cannot all be in 225 00:09:40,810 --> 00:09:38,779 the same energy so what do they do they 226 00:09:43,240 --> 00:09:40,820 spread out and so the energies of the 227 00:09:46,000 --> 00:09:43,250 electrons spread out as you move the 228 00:09:48,790 --> 00:09:46,010 atoms closer and closer together the 229 00:09:53,170 --> 00:09:48,800 vertical dashed line shows the inter 230 00:09:56,740 --> 00:09:53,180 atomic spacing of the atoms in a solid 231 00:10:00,040 --> 00:09:56,750 and so at that spacing what do you end 232 00:10:03,250 --> 00:10:00,050 up with you end up with bands a gap and 233 00:10:03,610 --> 00:10:03,260 bands and so we end up with the same 234 00:10:05,350 --> 00:10:03,620 thing 235 00:10:08,350 --> 00:10:05,360 this was mind-blowing to me as a student 236 00:10:10,840 --> 00:10:08,360 two totally different ways of deriving 237 00:10:13,150 --> 00:10:10,850 semiconductor band structure now which 238 00:10:15,730 --> 00:10:13,160 one is process in which one is principle 239 00:10:18,850 --> 00:10:15,740 so let's step back a little bit and take 240 00:10:20,410 --> 00:10:18,860 a look so I just divided things into 241 00:10:23,430 --> 00:10:20,420 process in principle but it's really a 242 00:10:30,160 --> 00:10:26,910 principle can be a conservation concept 243 00:10:32,699 --> 00:10:30,170 process might be kinetics principle can 244 00:10:36,400 --> 00:10:32,709 be a purpose the purpose of least action 245 00:10:39,790 --> 00:10:36,410 the process might be the mechanism you 246 00:10:43,090 --> 00:10:39,800 push this it moves it might be what what 247 00:10:45,800 --> 00:10:43,100 happens versus how it happens principle 248 00:10:48,290 --> 00:10:45,810 tends to be more abstract process tensed 249 00:10:50,780 --> 00:10:48,300 a more concrete principle tends to be a 250 00:10:52,940 --> 00:10:50,790 global thing process tends to be local 251 00:10:55,670 --> 00:10:52,950 and so in looking at the semiconductor 252 00:10:58,130 --> 00:10:55,680 example the periodic potential is global 253 00:11:00,170 --> 00:10:58,140 the spreading of atomic orbitals is 254 00:11:02,990 --> 00:11:00,180 local and so therefore that's how I 255 00:11:04,610 --> 00:11:03,000 would divide these two concepts then we 256 00:11:05,900 --> 00:11:04,620 want to go a little bit farther and 257 00:11:08,570 --> 00:11:05,910 that's why I call this whole thing 258 00:11:10,910 --> 00:11:08,580 dualism so we know the philosophical 259 00:11:13,880 --> 00:11:10,920 concept of dualism which divides the 260 00:11:16,730 --> 00:11:13,890 world into mind and body or mind and 261 00:11:18,950 --> 00:11:16,740 matter and there's a real parallel here 262 00:11:21,800 --> 00:11:18,960 because I've got very little time I 263 00:11:23,870 --> 00:11:21,810 won't go into that much but so in 264 00:11:26,300 --> 00:11:23,880 semiconductors draw a structure band 265 00:11:28,190 --> 00:11:26,310 structure we also have a principle in 266 00:11:30,280 --> 00:11:28,200 process so let's take a look at another 267 00:11:32,570 --> 00:11:30,290 one and this is the really tricky one 268 00:11:35,750 --> 00:11:32,580 microscopic interactions so we know that 269 00:11:38,660 --> 00:11:35,760 microscopic interactions are described 270 00:11:41,000 --> 00:11:38,670 by quantum mechanics quantum mechanics 271 00:11:42,290 --> 00:11:41,010 one of the operational equations for 272 00:11:44,660 --> 00:11:42,300 quantum mechanics is the Schrodinger 273 00:11:47,180 --> 00:11:44,670 equation here I show an example of the 274 00:11:49,670 --> 00:11:47,190 time dependent Schrodinger equation how 275 00:11:51,950 --> 00:11:49,680 does this work well let's say that we 276 00:11:54,710 --> 00:11:51,960 have here the the example that's always 277 00:11:57,380 --> 00:11:54,720 brought up the example of the double 278 00:11:59,570 --> 00:11:57,390 slits so you're sending electrons one at 279 00:12:01,490 --> 00:11:59,580 a time through double slits the electron 280 00:12:04,550 --> 00:12:01,500 goes through one slit or another slit 281 00:12:06,680 --> 00:12:04,560 you know the story it keeps on going and 282 00:12:08,990 --> 00:12:06,690 you would expect that if you're sending 283 00:12:11,360 --> 00:12:09,000 particles through slits you'd end up 284 00:12:14,000 --> 00:12:11,370 with just sort of a smear pattern on the 285 00:12:16,040 --> 00:12:14,010 target but you don't get a smear pattern 286 00:12:18,380 --> 00:12:16,050 instead you get a series of lines that 287 00:12:20,900 --> 00:12:18,390 says that the electrons these particles 288 00:12:24,590 --> 00:12:20,910 have wave-like characteristics which 289 00:12:26,360 --> 00:12:24,600 cause interference patterns from waves 290 00:12:29,110 --> 00:12:26,370 so we've got waves 291 00:12:32,810 --> 00:12:29,120 we've got particles very very disturbing 292 00:12:35,380 --> 00:12:32,820 but yet quantum mechanic mechanics tells 293 00:12:37,820 --> 00:12:35,390 us what happens it doesn't tell us why 294 00:12:39,170 --> 00:12:37,830 let's take a look at another example and 295 00:12:41,630 --> 00:12:39,180 there are many many let's take a look at 296 00:12:44,410 --> 00:12:41,640 black holes so we know that there's an 297 00:12:47,590 --> 00:12:44,420 event horizon in black holes and if 298 00:12:52,490 --> 00:12:47,600 anything encounters the event horizon 299 00:12:55,110 --> 00:12:52,500 impasse it'll apart particles 300 00:12:57,920 --> 00:12:55,120 radiation everything falls into the 301 00:13:01,050 --> 00:12:57,930 black hole never to come out again 302 00:13:02,879 --> 00:13:01,060 except for Hawking radiation 303 00:13:04,829 --> 00:13:02,889 so Hawking figured out that there is a 304 00:13:08,040 --> 00:13:04,839 way to radiate particles from a black 305 00:13:11,220 --> 00:13:08,050 hole and this has to do with pair 306 00:13:13,189 --> 00:13:11,230 creation so in the vacuum you're 307 00:13:15,629 --> 00:13:13,199 constantly creating 308 00:13:19,319 --> 00:13:15,639 particle-antiparticle pairs they're 309 00:13:22,530 --> 00:13:19,329 created and they recombine and if you 310 00:13:25,259 --> 00:13:22,540 have this pair of creation but occur 311 00:13:28,500 --> 00:13:25,269 near the event horizon and the 312 00:13:32,400 --> 00:13:28,510 antiparticle say a positron falls into 313 00:13:34,710 --> 00:13:32,410 the black hole and the the particle 314 00:13:37,519 --> 00:13:34,720 comes out of the black hole eventually 315 00:13:39,689 --> 00:13:37,529 the antiparticle will recombine with 316 00:13:41,939 --> 00:13:39,699 another particle inside the black hole 317 00:13:44,910 --> 00:13:41,949 and disappear and you've ended up with a 318 00:13:46,740 --> 00:13:44,920 particle outside great so that works so 319 00:13:49,560 --> 00:13:46,750 you actually can radiate from a black 320 00:13:52,319 --> 00:13:49,570 hole in that way so when I heard about 321 00:13:54,870 --> 00:13:52,329 this I was really puzzled why doesn't 322 00:13:56,790 --> 00:13:54,880 the other process occur why don't you 323 00:13:59,430 --> 00:13:56,800 have the antiparticle falling into the 324 00:14:01,410 --> 00:13:59,440 black hole the particle coming out of 325 00:14:03,480 --> 00:14:01,420 the black hole sorry it's the opposite 326 00:14:04,500 --> 00:14:03,490 way why don't you have the particle 327 00:14:06,660 --> 00:14:04,510 falling into the black hole the 328 00:14:08,490 --> 00:14:06,670 antiparticle coming out in which case 329 00:14:10,110 --> 00:14:08,500 ultimately what you've done is you've 330 00:14:11,900 --> 00:14:10,120 just fed the black hole with more 331 00:14:13,680 --> 00:14:11,910 particles you haven't had radiation and 332 00:14:16,949 --> 00:14:13,690 statistically you'd think there'd be an 333 00:14:20,780 --> 00:14:16,959 equal number of anti particles going in 334 00:14:23,970 --> 00:14:20,790 and particles going in so I went to my 335 00:14:27,120 --> 00:14:23,980 uncle who's a well-known cosmologists 336 00:14:30,300 --> 00:14:27,130 and I said Uncle Warner why does it 337 00:14:35,040 --> 00:14:30,310 happen this way and he said well you see 338 00:14:38,970 --> 00:14:35,050 Garrett you cannot have an antiparticle 339 00:14:41,040 --> 00:14:38,980 hat in in free space has a negative 340 00:14:42,569 --> 00:14:41,050 total energy that commits the sum of the 341 00:14:46,050 --> 00:14:42,579 kinetic energy and the potential energy 342 00:14:48,809 --> 00:14:46,060 and you cannot have an antiparticle in 343 00:14:50,939 --> 00:14:48,819 free space and I said why not 344 00:14:52,949 --> 00:14:50,949 and he said well relativistic quantum 345 00:14:56,340 --> 00:14:52,959 mechanics says you cannot have an 346 00:14:58,110 --> 00:14:56,350 antiparticle in free space is that an 347 00:15:01,769 --> 00:14:58,120 answer well that's what that's what 348 00:15:04,150 --> 00:15:01,779 we're told and that is the answer and so 349 00:15:08,680 --> 00:15:04,160 again once again quantum mechanics 350 00:15:11,050 --> 00:15:08,690 what it doesn't tell us how so therefore 351 00:15:13,360 --> 00:15:11,060 if we want to make our principle versus 352 00:15:17,130 --> 00:15:13,370 process we have quantum mechanics as a 353 00:15:20,200 --> 00:15:17,140 principle what the devil is the process 354 00:15:22,270 --> 00:15:20,210 so there have been a number of theories 355 00:15:23,880 --> 00:15:22,280 that have been proposed one that I 356 00:15:26,070 --> 00:15:23,890 particularly like a stochastic 357 00:15:29,560 --> 00:15:26,080 electrodynamics and stochastic 358 00:15:32,560 --> 00:15:29,570 electrodynamics says that the world is 359 00:15:35,650 --> 00:15:32,570 actually classical with the addition of 360 00:15:37,750 --> 00:15:35,660 zero-point fields so zero point fields 361 00:15:41,110 --> 00:15:37,760 are all over the place and they cause a 362 00:15:43,990 --> 00:15:41,120 jiggling and that jiggling is what we 363 00:15:45,940 --> 00:15:44,000 interpret as quantum behavior and this 364 00:15:48,370 --> 00:15:45,950 was developed originally from some ideas 365 00:15:50,080 --> 00:15:48,380 of by Einstein it was developed over the 366 00:15:52,990 --> 00:15:50,090 years by Boyer and various other people 367 00:15:56,230 --> 00:15:53,000 just this last year de la pena a 368 00:15:58,900 --> 00:15:56,240 professor in Mexico published an amazing 369 00:16:01,000 --> 00:15:58,910 treatise called the emerging quantum and 370 00:16:03,610 --> 00:16:01,010 what he did is he used stochastic 371 00:16:05,590 --> 00:16:03,620 electro dynamic processes to derive 372 00:16:08,830 --> 00:16:05,600 quantum mechanics he derived the 373 00:16:11,110 --> 00:16:08,840 Schrodinger equation he derived a fully 374 00:16:18,700 --> 00:16:11,120 quantum mechanical explanation for 375 00:16:21,580 --> 00:16:18,710 things and this may be a process way of 376 00:16:24,180 --> 00:16:21,590 looking at what quantum mechanics gives 377 00:16:28,720 --> 00:16:24,190 us a principled way of looking at is 378 00:16:34,580 --> 00:16:28,730 stochastic electrodynamics right is 379 00:16:42,440 --> 00:16:36,530 I don't think that's an appropriate 380 00:16:44,570 --> 00:16:42,450 question so has the world come to the 381 00:16:46,130 --> 00:16:44,580 doorstep of Della Pena and Boyer and a 382 00:16:48,440 --> 00:16:46,140 number of other people before who move 383 00:16:50,180 --> 00:16:48,450 develop stochastic electrodynamics no of 384 00:16:51,740 --> 00:16:50,190 course not they've ignored it because 385 00:16:55,000 --> 00:16:51,750 quantum mechanics gives the right answer 386 00:16:58,460 --> 00:16:55,010 so why do you need to go anywhere else 387 00:17:00,830 --> 00:16:58,470 but yet something is missing here so if 388 00:17:04,190 --> 00:17:00,840 we go and we look now at the parallel 389 00:17:05,900 --> 00:17:04,200 theories we've got a series of parallel 390 00:17:09,080 --> 00:17:05,910 theories where there's principle and 391 00:17:15,230 --> 00:17:09,090 process two ways of looking at the same 392 00:17:18,080 --> 00:17:15,240 phenomena in each case and giving us the 393 00:17:20,240 --> 00:17:18,090 same answer the one outlier that I found 394 00:17:23,360 --> 00:17:20,250 ister is a quantum mechanics where there 395 00:17:25,010 --> 00:17:23,370 is no established process way of looking 396 00:17:27,950 --> 00:17:25,020 at it one thing that I found interesting 397 00:17:30,380 --> 00:17:27,960 in looking at this is that Einstein has 398 00:17:32,780 --> 00:17:30,390 his name behind three of these between 399 00:17:35,540 --> 00:17:32,790 detail balance special relativity and 400 00:17:39,170 --> 00:17:35,550 also stochastic electrodynamics to some 401 00:17:41,620 --> 00:17:39,180 extent so I think this tells us the way 402 00:17:45,740 --> 00:17:41,630 that Einstein liked to look at the world 403 00:17:49,150 --> 00:17:45,750 so now I ask you which suits you better 404 00:17:54,340 --> 00:17:49,160 do you prefer one way or the other I 405 00:17:57,170 --> 00:17:54,350 tend to be a process guy but I some of 406 00:18:00,380 --> 00:17:57,180 brilliant people I know are principled 407 00:18:01,550 --> 00:18:00,390 guys so let's let's see where do we get 408 00:18:05,720 --> 00:18:01,560 what do we get from this 409 00:18:09,170 --> 00:18:05,730 so most physical phenomena can be 410 00:18:11,240 --> 00:18:09,180 described by two different approaches 411 00:18:12,500 --> 00:18:11,250 one that I'm calling process one that 412 00:18:15,500 --> 00:18:12,510 I'm calling principle sort of a 413 00:18:18,800 --> 00:18:15,510 dualistic approach quantum mechanics 414 00:18:21,710 --> 00:18:18,810 lacks an accepted theory describing the 415 00:18:23,840 --> 00:18:21,720 process and from at least my way of 416 00:18:25,970 --> 00:18:23,850 understanding this is the problem with 417 00:18:29,750 --> 00:18:25,980 quantum mechanics this is what we need 418 00:18:32,450 --> 00:18:29,760 to balance what we understand in quantum 419 00:18:36,290 --> 00:18:32,460 mechanics then to answer the basic 420 00:18:37,940 --> 00:18:36,300 question of which is right which theory 421 00:18:39,920 --> 00:18:37,950 is right when someone comes up with a 422 00:18:41,990 --> 00:18:39,930 theory that explains what relativity 423 00:18:45,060 --> 00:18:42,000 explains and says no this shows that 424 00:18:49,980 --> 00:18:45,070 Einstein is wrong No 425 00:18:52,950 --> 00:18:49,990 nature just is how we describe it is up 426 00:18:55,470 --> 00:18:52,960 to us but we often make the mistake of 427 00:18:58,169 --> 00:18:55,480 thinking that our descriptions are a 428 00:19:02,370 --> 00:18:58,179 reality the descriptions are just a 429 00:19:05,340 --> 00:19:02,380 description and so my answer to many 430 00:19:17,240 --> 00:19:05,350 questions about one view versus another 431 00:19:31,799 --> 00:19:27,419 York I'd like to make a couple of quills 432 00:19:33,870 --> 00:19:31,809 or perhaps clarifications for for the 433 00:19:36,120 --> 00:19:33,880 the sake of the non physicists in the 434 00:19:37,980 --> 00:19:36,130 audience I'd like to point out that you 435 00:19:40,500 --> 00:19:37,990 are consistently referring to anti 436 00:19:43,380 --> 00:19:40,510 particles when what you really meant 437 00:19:45,419 --> 00:19:43,390 were negative energy virtual particles 438 00:19:47,970 --> 00:19:45,429 in terms of the conventional matter 439 00:19:50,010 --> 00:19:47,980 antimatter a black hole will produce as 440 00:19:54,000 --> 00:19:50,020 many electrons as positrons you can tell 441 00:19:58,620 --> 00:19:56,669 another small quibble is that I I think 442 00:20:00,570 --> 00:19:58,630 you've misrepresented Einsteins of 443 00:20:05,460 --> 00:20:00,580 legions yeah he originally derived 444 00:20:08,850 --> 00:20:05,470 relativity from Maxwell's equations in 445 00:20:11,760 --> 00:20:08,860 fact his first thought experiment in the 446 00:20:14,039 --> 00:20:11,770 area was his realization that if you 447 00:20:17,400 --> 00:20:14,049 could somehow move with a ray of light 448 00:20:19,740 --> 00:20:17,410 at the same speed you would see that 449 00:20:21,600 --> 00:20:19,750 it's fields were not obeying Maxwell's 450 00:20:23,370 --> 00:20:21,610 equations okay so I've got a quibble 451 00:20:25,890 --> 00:20:23,380 with you on that one 452 00:20:30,000 --> 00:20:25,900 the way that something historically 453 00:20:32,880 --> 00:20:30,010 evolved doesn't mean doesn't define the 454 00:20:35,700 --> 00:20:32,890 way that we have to look at it and so 455 00:20:37,470 --> 00:20:35,710 very often we start from some specific 456 00:20:45,419 --> 00:20:37,480 and get a general and later say the 457 00:20:51,140 --> 00:20:45,429 general gives us the specific I just 458 00:20:54,659 --> 00:20:51,150 like to quote quickly a little known 459 00:20:55,400 --> 00:20:54,669 Cambridge mathematician from many years 460 00:20:59,669 --> 00:20:55,410 ago 461 00:21:04,490 --> 00:20:59,679 Gee's Spencer Browne and he went a lot 462 00:21:09,240 --> 00:21:04,500 on the definitions of words so explain 463 00:21:14,100 --> 00:21:09,250 explain that is to lay out flat as on a 464 00:21:20,100 --> 00:21:14,110 map or a diagram and so miss the 465 00:21:29,549 --> 00:21:20,110 complexity of the reality or royalty of 466 00:21:32,190 --> 00:21:29,559 the wells as Cheers here it in regards 467 00:21:35,100 --> 00:21:32,200 to your quantum mechanical dismissal of 468 00:21:36,900 --> 00:21:35,110 the double slit experiment I would at 469 00:21:39,870 --> 00:21:36,910 least like to propose a little quibble 470 00:21:41,669 --> 00:21:39,880 as well and that is when you analyze the 471 00:21:44,250 --> 00:21:41,679 double slit with single particles going 472 00:21:46,680 --> 00:21:44,260 through the slits Paul Dirac another 473 00:21:49,590 --> 00:21:46,690 famous physicist of standard model a 474 00:21:51,360 --> 00:21:49,600 hero said of particle never interacts 475 00:21:54,180 --> 00:21:51,370 with another it always interacts with 476 00:21:57,060 --> 00:21:54,190 itself so if we look at the particle in 477 00:22:00,270 --> 00:21:57,070 terms of a wave packet extending past 478 00:22:02,039 --> 00:22:00,280 both slits then we kind of at least 479 00:22:04,320 --> 00:22:02,049 understand the interference that's 480 00:22:07,340 --> 00:22:04,330 occurring and of course the collapse of 481 00:22:09,650 --> 00:22:07,350 the wave packet onto a single dot 482 00:22:11,789 --> 00:22:09,660 looking like an interference pattern 483 00:22:14,490 --> 00:22:11,799 seems to make a little more sense that 484 00:22:17,669 --> 00:22:14,500 way just it's a con we don't disagree at 485 00:22:19,530 --> 00:22:17,679 all oh god I I agree with you fully and 486 00:22:21,810 --> 00:22:19,540 I'm not I don't want to deride quantum 487 00:22:23,460 --> 00:22:21,820 mechanics it works and various 488 00:22:25,919 --> 00:22:23,470 interpretations of quantum mechanics 489 00:22:28,380 --> 00:22:25,929 such as the one you described work I'm 490 00:22:30,180 --> 00:22:28,390 not saying they're wrong I just what I 491 00:22:31,860 --> 00:22:30,190 do want to say is that there's another 492 00:22:34,409 --> 00:22:31,870 way of looking at it you know and I love 493 00:22:36,440 --> 00:22:34,419 CD as well so conceptually I agree with 494 00:22:40,500 --> 00:22:36,450 you 495 00:22:42,960 --> 00:22:40,510 yes Garrett could it be that the 496 00:22:45,600 --> 00:22:42,970 difficulty in explaining of forming a 497 00:22:47,280 --> 00:22:45,610 process model is that we're trying to do 498 00:22:49,470 --> 00:22:47,290 it in black and white whereas quantum 499 00:22:51,750 --> 00:22:49,480 mechanics is really in color so to speak 500 00:22:55,590 --> 00:22:51,760 in other words we're trying to use a 501 00:22:56,909 --> 00:22:55,600 classical mind type approach to describe 502 00:22:59,520 --> 00:22:56,919 something that is fundamentally not 503 00:23:03,360 --> 00:22:59,530 classically it's quantum like quantum 504 00:23:06,659 --> 00:23:03,370 information so that's a deep question 505 00:23:08,340 --> 00:23:06,669 and I don't obviously I'm not the person 506 00:23:11,909 --> 00:23:08,350 who knows the answer I don't know if 507 00:23:14,640 --> 00:23:11,919 anybody does but I wonder whether we 508 00:23:19,210 --> 00:23:14,650 have sort of warped the way that we 509 00:23:21,850 --> 00:23:19,220 think about reality to conform to the 510 00:23:24,700 --> 00:23:21,860 open Hagen view or other views of 511 00:23:28,930 --> 00:23:24,710 quantum mechanics and so we've gone way 512 00:23:31,960 --> 00:23:28,940 out on a limb to try to understand 513 00:23:34,210 --> 00:23:31,970 something very very strange when in fact 514 00:23:37,899 --> 00:23:34,220 we don't need to do that we can 515 00:23:41,169 --> 00:23:37,909 understand it from a more simple process 516 00:23:44,289 --> 00:23:41,179 point of view that fits our intuition 517 00:23:48,780 --> 00:23:44,299 better I don't know but I wonder about