1 00:00:10,879 --> 00:00:05,920 [Music] 2 00:00:16,369 --> 00:00:10,889 okay my talk is about the physical basis 3 00:00:18,410 --> 00:00:16,379 for nonlocality and first of all we 4 00:00:23,689 --> 00:00:18,420 should make clear that nonlocality 5 00:00:27,820 --> 00:00:23,699 is non-local causality the background to 6 00:00:30,410 --> 00:00:27,830 this diagram here is a spacetime diagram 7 00:00:34,220 --> 00:00:30,420 showing the separation of Toole art 8 00:00:35,930 --> 00:00:34,230 light particles in space going in 9 00:00:42,590 --> 00:00:35,940 opposite directions from each other and 10 00:00:45,080 --> 00:00:42,600 moving forward in time local causality 11 00:00:49,430 --> 00:00:45,090 says that the cause of these two 12 00:00:53,720 --> 00:00:49,440 particles is at the common source which 13 00:00:55,310 --> 00:00:53,730 is right there at the center non-local 14 00:01:00,580 --> 00:00:55,320 causality says that the cause is 15 00:01:05,000 --> 00:01:00,590 elsewhere picture a baseball in flight 16 00:01:07,399 --> 00:01:05,010 to going to the op field is the 17 00:01:15,800 --> 00:01:07,409 trajectory of the baseball caused by the 18 00:01:21,080 --> 00:01:15,810 batter or by the glove that catches the 19 00:01:21,649 --> 00:01:21,090 fly ball food for thought here's what 20 00:01:26,390 --> 00:01:21,659 we'll do 21 00:01:29,630 --> 00:01:26,400 I'll give you a nutshell description of 22 00:01:32,630 --> 00:01:29,640 Bell's Theorem show you a conceptual 23 00:01:39,700 --> 00:01:32,640 entangled particles experiment involving 24 00:01:43,039 --> 00:01:39,710 two polarized photons which is based on 25 00:01:47,090 --> 00:01:43,049 original experiments done to test the 26 00:01:50,810 --> 00:01:47,100 Bell's Theorem concept by Friedman and 27 00:01:55,429 --> 00:01:50,820 Claus ER in Berkeley and famously by 28 00:01:57,920 --> 00:01:55,439 Alanis Bey in France will discuss the 29 00:02:00,380 --> 00:01:57,930 quantum probabilities for the 30 00:02:02,780 --> 00:02:00,390 measurement outcome and then we'll 31 00:02:06,230 --> 00:02:02,790 discuss the local causality constraints 32 00:02:08,900 --> 00:02:06,240 on those outcomes finally we'll talk 33 00:02:11,600 --> 00:02:08,910 about non-local causality and the 34 00:02:13,089 --> 00:02:11,610 implications for time reversal of cause 35 00:02:18,440 --> 00:02:13,099 and effect 36 00:02:34,790 --> 00:02:18,450 Bell's Theorem says that under certain 37 00:02:38,600 --> 00:02:36,740 well I'll just read predictions of 38 00:02:41,990 --> 00:02:38,610 measurement outcomes for certain 39 00:02:45,590 --> 00:02:42,000 entangled states are inconsistent with 40 00:02:48,890 --> 00:02:45,600 local causality Bell's Theorem was 41 00:02:52,610 --> 00:02:48,900 published nearly fifty years ago in the 42 00:02:55,370 --> 00:02:52,620 journal physics and it was the first 43 00:02:57,650 --> 00:02:55,380 issue of the journal and the journal 44 00:03:00,590 --> 00:02:57,660 interestingly enough folded after that 45 00:03:03,800 --> 00:03:00,600 first issue and for the next decade 46 00:03:07,280 --> 00:03:03,810 Bell's issue Bell sphere theorem was 47 00:03:10,300 --> 00:03:07,290 rather underwhelming the mathematical 48 00:03:14,330 --> 00:03:10,310 inequality was experimentally tested and 49 00:03:16,790 --> 00:03:14,340 it has consistently been found that 50 00:03:21,200 --> 00:03:16,800 quantum mechanics rules and local 51 00:03:25,430 --> 00:03:21,210 causality often fails present 52 00:03:27,980 --> 00:03:25,440 demonstration of bells inequality due to 53 00:03:33,080 --> 00:03:27,990 henry staff i will follow his analysis 54 00:03:35,120 --> 00:03:33,090 it was published in July of 1977 so this 55 00:03:38,840 --> 00:03:35,130 is all pretty old stuff here's the 56 00:03:42,560 --> 00:03:38,850 experimental setup we have a vibrating 57 00:03:44,690 --> 00:03:42,570 atom in a hot vapor in the middle it 58 00:03:47,060 --> 00:03:44,700 emits two photons going in opposite 59 00:03:51,620 --> 00:03:47,070 directions they are both polarized in 60 00:03:53,780 --> 00:03:51,630 the same plane one up and one down the 61 00:03:58,220 --> 00:03:53,790 direction of polarization is a 62 00:04:01,370 --> 00:03:58,230 superposition of all directions until a 63 00:04:05,110 --> 00:04:01,380 measurement is made and then there is 64 00:04:10,280 --> 00:04:05,120 just one direction of polarization the 65 00:04:12,530 --> 00:04:10,290 polarizer angles the polarizer axes are 66 00:04:15,380 --> 00:04:12,540 at an angle of theta with each other and 67 00:04:20,860 --> 00:04:15,390 we will be referring to theta during the 68 00:04:24,940 --> 00:04:20,870 discussion of the analysis the photons 69 00:04:28,520 --> 00:04:24,950 incident on the polarisers are either 70 00:04:31,760 --> 00:04:28,530 transmitted or absorbed if they are 71 00:04:35,000 --> 00:04:31,770 transmitted a single polarization state 72 00:04:39,890 --> 00:04:35,010 comes out and is detected by the 73 00:04:42,320 --> 00:04:39,900 detector well I've got rocks in my head 74 00:04:44,750 --> 00:04:42,330 for sure that's the success what's going 75 00:04:46,340 --> 00:04:44,760 on this morning either that I don't 76 00:04:48,770 --> 00:04:46,350 understand Bell's Theorem but I believe 77 00:04:53,450 --> 00:04:48,780 I do understand Bell's Theorem 78 00:04:56,570 --> 00:04:53,460 and I am not bothered by the time 79 00:05:00,380 --> 00:04:56,580 reversal of cause and effect which is 80 00:05:03,230 --> 00:05:00,390 where Bell's Theorem leads me that first 81 00:05:07,190 --> 00:05:03,240 statement I got out of physics today 82 00:05:09,940 --> 00:05:07,200 magazine a number of years ago the 83 00:05:13,310 --> 00:05:09,950 second statement is more famously 84 00:05:14,990 --> 00:05:13,320 attributed to Albert Einstein is the 85 00:05:18,980 --> 00:05:15,000 moon only there when I'm looking at it 86 00:05:23,860 --> 00:05:18,990 was his rebellion against the idea that 87 00:05:27,050 --> 00:05:23,870 the active formation of a state can be 88 00:05:33,740 --> 00:05:27,060 affected by a passive a passive 89 00:05:36,740 --> 00:05:33,750 observation of that state these symbols 90 00:05:39,350 --> 00:05:36,750 are the symbols that we were you will 91 00:05:43,220 --> 00:05:39,360 use to demonstrate the four outcomes 92 00:05:46,070 --> 00:05:43,230 four possible outcomes of photon 93 00:05:48,620 --> 00:05:46,080 incidents on the polarisers the two 94 00:05:54,290 --> 00:05:48,630 circles represent the front and rear 95 00:05:56,360 --> 00:05:54,300 polarisers the the blank or white open 96 00:06:00,260 --> 00:05:56,370 circle represents the transmission of a 97 00:06:05,780 --> 00:06:00,270 photon the shaded circle represents the 98 00:06:08,540 --> 00:06:05,790 absorption of a photon the upper-left 99 00:06:11,960 --> 00:06:08,550 corner is a coincidence measurement in 100 00:06:16,160 --> 00:06:11,970 which both photons are transmitted the 101 00:06:18,980 --> 00:06:16,170 lower right corner is a null measurement 102 00:06:24,170 --> 00:06:18,990 where both photons are absorbed the 103 00:06:27,110 --> 00:06:24,180 other two are mixed measurements these 104 00:06:32,200 --> 00:06:27,120 are the symbols that we will use to show 105 00:06:35,000 --> 00:06:32,210 the orientation of the polarizer x' the 106 00:06:38,840 --> 00:06:35,010 arrows will show schematically what the 107 00:06:43,420 --> 00:06:38,850 orientations are the angle theta is 108 00:06:47,360 --> 00:06:43,430 shown off to the left numerically if the 109 00:06:48,860 --> 00:06:47,370 circles are shaded green the results are 110 00:06:52,220 --> 00:06:48,870 due to quantum mechanics 111 00:06:55,670 --> 00:06:52,230 if the circles circles are shaded pink 112 00:06:59,750 --> 00:06:55,680 look almost purple here it's due to 113 00:07:01,640 --> 00:06:59,760 local causality here are the results for 114 00:07:05,240 --> 00:07:01,650 quantum mechanical measurement 115 00:07:09,469 --> 00:07:05,250 abilities the four large boxes are 116 00:07:13,659 --> 00:07:09,479 associated with the four polarizer angle 117 00:07:17,240 --> 00:07:13,669 settings these are chosen to display an 118 00:07:22,100 --> 00:07:17,250 inconsistency between quantum mechanics 119 00:07:25,159 --> 00:07:22,110 and local causality the four small boxes 120 00:07:27,529 --> 00:07:25,169 represent the four outcomes of a two 121 00:07:34,090 --> 00:07:27,539 photon incidence measurement that we 122 00:07:41,029 --> 00:07:34,100 discussed before by way of an example 123 00:07:44,360 --> 00:07:41,039 the upper right the two 50% are obtained 124 00:07:48,200 --> 00:07:44,370 when you have the polarisers aligned and 125 00:07:50,540 --> 00:07:48,210 you expect the photons which are both 126 00:07:54,680 --> 00:07:50,550 polarized in the same state to either be 127 00:07:59,150 --> 00:07:54,690 both transmitted or both rejected both 128 00:08:03,409 --> 00:07:59,160 absorb with equal probability well 129 00:08:06,589 --> 00:08:03,419 here's how we demonstrate the effects of 130 00:08:09,800 --> 00:08:06,599 local causality I won't go through this 131 00:08:12,680 --> 00:08:09,810 in great detail but what we do is we 132 00:08:16,430 --> 00:08:12,690 change the polarizer angles one at a 133 00:08:20,300 --> 00:08:16,440 time and as we change the polarizer 134 00:08:24,320 --> 00:08:20,310 angles we look at the effects the 135 00:08:27,439 --> 00:08:24,330 changes in the events from coincidence 136 00:08:30,290 --> 00:08:27,449 measurements to mixed measurements down 137 00:08:32,510 --> 00:08:30,300 to null measurements we fall we do this 138 00:08:42,920 --> 00:08:32,520 in two ways we follow the red arrows and 139 00:08:45,920 --> 00:08:42,930 the blue arrows now when we when we 140 00:08:49,880 --> 00:08:45,930 change a polarizer angle we assume that 141 00:08:52,780 --> 00:08:49,890 the very same exact set of photons is 142 00:08:57,079 --> 00:08:52,790 still incident on the two polarizers 143 00:09:00,740 --> 00:08:57,089 so the photons due to local causality 144 00:09:03,650 --> 00:09:00,750 the photons are like real objects when 145 00:09:05,920 --> 00:09:03,660 they strike the untrained polarizer they 146 00:09:08,600 --> 00:09:05,930 will transmit exactly as they did before 147 00:09:10,940 --> 00:09:08,610 when they strike the polarizer that has 148 00:09:13,069 --> 00:09:10,950 been changed they will be partially 149 00:09:14,800 --> 00:09:13,079 blocked because of the misalignment of 150 00:09:18,519 --> 00:09:14,810 the polarizer 151 00:09:21,640 --> 00:09:18,529 we follow the red arrows around the 152 00:09:26,290 --> 00:09:21,650 logic will tell us that if we assume 153 00:09:28,510 --> 00:09:26,300 that quantum mechanics is obeyed and the 154 00:09:32,560 --> 00:09:28,520 result is compatible with quantum 155 00:09:37,990 --> 00:09:32,570 mechanics that the fraction of events 156 00:09:40,600 --> 00:09:38,000 changed from coincidence in the upper 157 00:09:44,110 --> 00:09:40,610 left to no events in the lower right 158 00:09:47,320 --> 00:09:44,120 that fraction must be less than 25% if 159 00:09:51,329 --> 00:09:47,330 we follow the blue arrows around the 160 00:09:54,640 --> 00:09:51,339 logic tells us that that fraction F is 161 00:09:57,040 --> 00:09:54,650 constrained by the difference in n1 and 162 00:10:02,440 --> 00:09:57,050 n2 which are the two new probabilities 163 00:10:06,060 --> 00:10:02,450 due to local causality here are the 164 00:10:08,380 --> 00:10:06,070 results for quantum mechanics on the top 165 00:10:12,460 --> 00:10:08,390 showing the bottom two polarizer 166 00:10:15,730 --> 00:10:12,470 settings for quantum mechanics and for 167 00:10:18,610 --> 00:10:15,740 local causality the local causality 168 00:10:21,250 --> 00:10:18,620 numbers less than 38 percent and so 169 00:10:23,020 --> 00:10:21,260 forth are derived out to break Li from 170 00:10:24,670 --> 00:10:23,030 the constraints the inequality 171 00:10:29,980 --> 00:10:24,680 constraint that I showed you on the last 172 00:10:34,920 --> 00:10:29,990 side slide and you can see that the the 173 00:10:39,160 --> 00:10:34,930 quantum mechanical numbers such as 42% 174 00:10:42,820 --> 00:10:39,170 42.7% for the coincidence measurements 175 00:10:47,650 --> 00:10:42,830 do not fit within the upper boundary for 176 00:10:50,579 --> 00:10:47,660 the for the local causality constraints 177 00:10:54,090 --> 00:10:50,589 so this shows that you that for a 178 00:10:57,090 --> 00:10:54,100 particular set of polarizer settings 179 00:11:00,790 --> 00:10:57,100 quantum mechanics is incompatible with 180 00:11:06,070 --> 00:11:00,800 local causality so what does this mean 181 00:11:08,710 --> 00:11:06,080 as far as causality is concerned if the 182 00:11:12,160 --> 00:11:08,720 cause is not at the source where is it 183 00:11:15,790 --> 00:11:12,170 is it with the observe ation is it at 184 00:11:19,600 --> 00:11:15,800 the detector one hypothesis the common 185 00:11:23,320 --> 00:11:19,610 explanation for this is that the two two 186 00:11:25,480 --> 00:11:23,330 for two photons are form a single 187 00:11:30,170 --> 00:11:25,490 quantum system a superposition of states 188 00:11:36,690 --> 00:11:33,840 the system immediately falls into a 189 00:11:39,840 --> 00:11:36,700 sting single state and that appears at 190 00:11:42,829 --> 00:11:39,850 both detector 1 and detector 2 instantly 191 00:11:46,079 --> 00:11:42,839 this doesn't explain to us very well 192 00:11:52,230 --> 00:11:46,089 what really happens in terms of space 193 00:11:54,360 --> 00:11:52,240 and time one explanation is that the 194 00:11:56,370 --> 00:11:54,370 source and the two detectors could be 195 00:12:01,490 --> 00:11:56,380 connected in some way in an interaction 196 00:12:06,870 --> 00:12:01,500 and that that detection could cause the 197 00:12:09,870 --> 00:12:06,880 that yeah that detection could cause the 198 00:12:16,440 --> 00:12:09,880 photons to be transmitted in the proper 199 00:12:18,680 --> 00:12:16,450 form too to obey quantum mechanics this 200 00:12:21,480 --> 00:12:18,690 would result in a superluminal 201 00:12:23,400 --> 00:12:21,490 transmission of information from 202 00:12:26,210 --> 00:12:23,410 detector 1 to detector 2 through the 203 00:12:29,870 --> 00:12:26,220 source faster than the speed of light 204 00:12:32,610 --> 00:12:29,880 the thing at the top is a palindrome 205 00:12:35,550 --> 00:12:32,620 which reads the same for word as it does 206 00:12:39,120 --> 00:12:35,560 backwards and here I'm proposing that we 207 00:12:41,280 --> 00:12:39,130 have another hypothesis was a time 208 00:12:44,340 --> 00:12:41,290 reversal of cause and effect 209 00:12:49,970 --> 00:12:44,350 we have detector one has a causal event 210 00:12:52,380 --> 00:12:49,980 which causes the appearance of a single 211 00:12:55,350 --> 00:12:52,390 polarization state which then wrote 212 00:12:57,660 --> 00:12:55,360 retro causally will propagate back to 213 00:13:00,449 --> 00:12:57,670 the source and cause that same 214 00:13:03,710 --> 00:13:00,459 polarization state to appear at the 215 00:13:07,050 --> 00:13:03,720 source which then comes forward to 216 00:13:10,680 --> 00:13:07,060 detector 2 this is time reversal of 217 00:13:13,980 --> 00:13:10,690 cause and effect and physicists go wild 218 00:13:17,329 --> 00:13:13,990 over this they just cannot encompass 219 00:13:20,689 --> 00:13:17,339 that however I like this because 220 00:13:26,730 --> 00:13:20,699 everything stays within the light cone 221 00:13:29,670 --> 00:13:26,740 everything is contiguous and it is 222 00:13:31,769 --> 00:13:29,680 relativistically invariant and this 223 00:13:34,050 --> 00:13:31,779 contrast was something that Pamela said 224 00:13:39,720 --> 00:13:34,060 earlier this morning that it doesn't 225 00:13:40,940 --> 00:13:39,730 satisfy relativity this scheme does the 226 00:13:48,570 --> 00:13:40,950 relativistic 227 00:13:54,210 --> 00:13:48,580 transformations will retain the same the 228 00:13:56,850 --> 00:13:54,220 same state finally you have to act ask 229 00:14:01,620 --> 00:13:56,860 which detector is causal and which is 230 00:14:04,410 --> 00:14:01,630 affected and I my hypothesis is that the 231 00:14:11,580 --> 00:14:04,420 both detectors participate in causality 232 00:14:13,560 --> 00:14:11,590 and if you have an emergence of a of a 233 00:14:16,920 --> 00:14:13,570 strong effect at either of the two 234 00:14:21,560 --> 00:14:16,930 detectors this thing can emerge on the 235 00:14:26,580 --> 00:14:21,570 macroscopic level and would cause a 236 00:14:30,150 --> 00:14:26,590 paranormal effect to occur so I submit 237 00:14:37,830 --> 00:14:30,160 that this is this is a source of 238 00:14:39,650 --> 00:14:37,840 paranormal effects I also submit that my 239 00:14:42,530 --> 00:14:39,660 time is up 240 00:14:44,930 --> 00:14:42,540 and I quit okay I'm open to questions 241 00:14:52,550 --> 00:14:44,940 and then we can go onto our non-local 242 00:14:55,280 --> 00:14:52,560 lunches if there are any questions I 243 00:14:57,950 --> 00:14:55,290 hope they're the right ones we do have a 244 00:15:00,260 --> 00:14:57,960 few minutes for questions even though 245 00:15:02,060 --> 00:15:00,270 our stomachs are growling yeah it must 246 00:15:09,350 --> 00:15:02,070 have been the reason I decided at 12 247 00:15:11,300 --> 00:15:09,360 o'clock we have to go eat okay well I 248 00:15:13,010 --> 00:15:11,310 thought that was very interesting data 249 00:15:14,270 --> 00:15:13,020 and I wondered if you had considered the 250 00:15:16,730 --> 00:15:14,280 possibility that there would be a 251 00:15:19,010 --> 00:15:16,740 quantum mechanical coupling or 252 00:15:21,550 --> 00:15:19,020 entanglement between the consciousness 253 00:15:25,510 --> 00:15:21,560 of the experimenter and the detectors 254 00:15:28,790 --> 00:15:25,520 something I didn't quite get to is that 255 00:15:31,190 --> 00:15:28,800 detector one may abet may be affected by 256 00:15:34,100 --> 00:15:31,200 what I call conscious observational 257 00:15:37,430 --> 00:15:34,110 causality and which others have called 258 00:15:40,640 --> 00:15:37,440 mental intention so that consciousness 259 00:15:43,250 --> 00:15:40,650 enters in at one or the other of the 260 00:15:45,230 --> 00:15:43,260 detectors one of the other sites causes 261 00:15:49,850 --> 00:15:45,240 a reversal of time and effect to 262 00:15:52,430 --> 00:15:49,860 propagate forward to the other site say 263 00:15:53,890 --> 00:15:52,440 detector to hope that answers that 264 00:15:56,540 --> 00:15:53,900 question 265 00:15:59,240 --> 00:15:56,550 if you read the many people that have 266 00:16:03,200 --> 00:15:59,250 commented on this whole argument you'll 267 00:16:05,270 --> 00:16:03,210 find a lot of people say that the bells 268 00:16:07,490 --> 00:16:05,280 inequality and ass pay experiments 269 00:16:10,400 --> 00:16:07,500 proved that Einsteins argument an EPR 270 00:16:13,040 --> 00:16:10,410 that quantum mechanics is incomplete was 271 00:16:17,330 --> 00:16:13,050 correct but you'll find just as many 272 00:16:20,030 --> 00:16:17,340 physicists say it's incorrect is quantum 273 00:16:23,150 --> 00:16:20,040 mechanics complete or not in your 274 00:16:27,710 --> 00:16:23,160 opinion no I don't believe it is 275 00:16:30,410 --> 00:16:27,720 complete because we do not have at this 276 00:16:33,110 --> 00:16:30,420 point an explanation for the randomness 277 00:16:35,270 --> 00:16:33,120 of cause of causality that occurs in 278 00:16:38,200 --> 00:16:35,280 quantum mechanics I believe that that 279 00:16:41,960 --> 00:16:38,210 randomness is connected with the 280 00:16:45,110 --> 00:16:41,970 conscious underworld so to speak the 281 00:16:47,450 --> 00:16:45,120 collective unconscious and and the 282 00:16:53,180 --> 00:16:47,460 consciousness that pervades our whole 283 00:16:56,120 --> 00:16:53,190 being so the simple answer is that it is 284 00:16:58,490 --> 00:16:56,130 complete but we need to branch off in 285 00:17:02,540 --> 00:16:58,500 another direction to find an alternate 286 00:17:05,929 --> 00:17:02,550 theory so for people googling all this 287 00:17:09,520 --> 00:17:05,939 there's Feynman wheeler to look up and 288 00:17:12,140 --> 00:17:09,530 Cramer transactional and I wonder if 289 00:17:15,520 --> 00:17:12,150 this you're just applying that to 290 00:17:19,819 --> 00:17:15,530 paranormal or is this a separate thing 291 00:17:24,260 --> 00:17:19,829 the Fineman wheeler work as I know it 292 00:17:28,210 --> 00:17:24,270 did involve a an advanced wave and a 293 00:17:31,460 --> 00:17:28,220 wave involving an 294 00:17:35,050 --> 00:17:31,470 electromagnetic interaction the advanced 295 00:17:38,690 --> 00:17:35,060 wave being the time reversed portion of 296 00:17:41,720 --> 00:17:38,700 cause-and-effect Fineman himself was 297 00:17:49,550 --> 00:17:41,730 unhappy with the outcome of that and he 298 00:17:52,100 --> 00:17:49,560 went on to to renormalization I believe 299 00:17:56,240 --> 00:17:52,110 as an alternative answer but I believe 300 00:17:58,640 --> 00:17:56,250 that the Fineman work on on the 301 00:18:01,910 --> 00:17:58,650 advancement on the advanced wave was 302 00:18:08,840 --> 00:18:01,920 valid and parallels what I've described 303 00:18:11,210 --> 00:18:08,850 here is that okay hi thanks for a good 304 00:18:13,670 --> 00:18:11,220 presentation I wonder if you're aware of 305 00:18:15,770 --> 00:18:13,680 the joy Kristen's paper from Oxford last 306 00:18:18,050 --> 00:18:15,780 year on upper bounds on quantum 307 00:18:18,770 --> 00:18:18,060 correlations and if you have any 308 00:18:20,750 --> 00:18:18,780 thoughts on that 309 00:18:25,820 --> 00:18:20,760 especially on what are the upper bounds 310 00:18:28,070 --> 00:18:25,830 for quantum correlations no I'm not 311 00:18:29,510 --> 00:18:28,080 familiar with that unless you lead me a 312 00:18:32,510 --> 00:18:29,520 little further I don't think I can 313 00:18:38,120 --> 00:18:32,520 comment on it if we're short on time 314 00:18:40,480 --> 00:18:38,130 maybe we should discuss it thank you