Hi Horace, You'd be surprised at some of the lurkers here. Wish they'd put a nickel in the slot every once and a while.
I'm a little confused about why this is such an accomplishment. Let me describe an experimental setup I worked with for some time, that has relevance to this. The experiment was designed to measure wave speed, and we needed a way to synchronize two detectors at a distance from one another. The solution was very simple. The detectors are equidistant, at the center was a pulse generator. A pair of air core transmission lines lead one to each detector. A pulse from the generator would arrive simultaneously at each detector, giving a light speed delayed timed pulse to each. Because the detectors were equidistant, they could be matched to within the resolution of the pulse rising edge ( ~ 10 ps ). The limit was the edge detection, it could have been 1 ps if that was needed. Is this circuit really any different that what's been described in the AIP bulletin? What do you think? I have a hard time getting past "bertlemans socks" despite reading at some length on the hidden variable problem. K. -----Original Message----- From: Horace Heffner [mailto:[EMAIL PROTECTED] Sent: Friday, September 17, 2004 3:17 PM To: [EMAIL PROTECTED] Subject: Re: Simple FTL communication method (Draft #1) The AIP Bulletin below contains nominal and possibly garbled information, though it is of interest that the method used to synchronize clocks using entangled photons uses significant elements of a method proposed here on vortex under this thread name in November of 2003. The elements include switching of the beams between alternate detectors and, more importantly, use of a statistical approach (in a statistical sense, entangled beam brightness) to obtaining the synchronization (or message). It appears mainstream physics is quickly catching up to the amateur concepts in this arena. 8^) Begin Quote of AIP Bulletin: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - >PHYSICS NEWS UPDATE >The American Institute of Physics Bulletin of Physics News >Number 701 September 17, 2004 by Phillip F. Schewe and Ben Stein [snip] > >CLOCK SYNCHRONIZATION WITH ENTANGLED PHOTONS has been proposed as an >idea and now demonstrated in an experiment. One of the important >issues in the theory of special relativity is the synchronization of >clocks. How close can be the time at one clock, t1, be to the time >at a second clock, t2? Modern clocks have improved to such a level >that the resolution and accuracy of the comparison techniques have >become the limiting factors to determine the degree of >synchronization, t1-t2. New ideas, exploiting the novel aspects of >entangled photons, say that quantum mechanics can overcome the >classical limit in regard to clock synchronization (see Update 499). >Physicists at the University of Maryland, Baltimore County, have now >confirmed the idea by doing an experiment in which two entangled >photons are sent respectively to two detectors some distance apart. >Pairs of entangled photons are produced in a nonlinear crystal and >will retain a special quantum correlation between themselves >(belonging, as they do, to a single quantum state) even if they were >to move apart to distances of trillions of km. The Maryland >physicists (contact Alejandra Valencia, [EMAIL PROTECTED]) >synchronized two distant clocks, each attached to a photodetector, >by building up a statistical sampling of the clock responses, first >sending a photon from one emerging beam to one detector while its >mate went to the other detector, and then switching the entangled >pairs to the opposite detectors. In this way, two clocks 3 km apart >were synchronized within a picosecond. Synchronicity is of course >critical in many areas of telecommunications, especially in GPS. >(Valencia et al., Applied Physics Letters, 27 September 2004) > - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - End Quote of AIP Bulletin. My method for communicating FTL using a statistical approach (i.e. beam brightness) to quantum entanglement detection follows. Description of method as proposed 11/5/03 on vortex under this thread name: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A method of communication is proposed here that uses the instantaneous teleportation of quantum state of entangled photons to communicate a signal faster than light speed. The method depends on the fact that when the polarization state of one member of an entangled pair of photons is determined, i.e. measured, the conjugate photon will then be measured in the conjugate state. The method consists of the following steps: 1. Use of an entangled photon generator which creates two channels of entangled photons: the local channel and the communication channel. The photons in the communication channel are conjugates of their entangled counterparts in the local channel. The polarization direction of conjugate pairs is orthogonal. 2. A delay is provided in the local channel by use of a fiber delay loop or other delaying mechanism such that a communication signal is only imposed upon the local channel photons at about the time of but before receipt of the paired communication channel photons at the destination. The local channel is assumed to be located entirely at the transmitting site. Alternatively the entangled photon generator can be located at the half-way point between sender and receiver, Alice and Bob, and beam one channel to each. 3. Photons in the local channel, after sufficient delay, are routed through one of two paths, the long path or the short path. This switching can be achieved using a fast electromechanical mirror. In the long path the photons are routed through a horizontal filter H1, then a diagonal filter D1, then a vertical filter V1 and then through another horizontal filter H2, In the short path the local photons are directed through a horizontal filter H3 and then a vertical filter V3. 4. Photons in the communication channel are passed through a vertical polarized filter V4 at Bob's location and the remaining signal detected. (Alternatively a horizontal filter could be used by Bob or Bob can separate the communication channel beam into horizontal and vertically polarized components using a calcite crystal and measure the comparative brightness of the two.) 5. The timing of switching between the long and short paths of the local channel is manipulated by Alice so as to send meaningful messages to Bob. In the short path every local path photon is in effect measured by Alice as being either horizontally or vertically polarized, and with a 0.5 probability of being either. In fact, as an alternative to using polarizing filters, Alice could actually separate the local beam into two halves and actually measure individual photon polarizations or even just relative beam brightness. Half the photons are absorbed by H3 and thus measured as vertical, and the remaining half are absorbed by V3 and thus measured as horizontal. Bob should detect 50/50 polarization on his end when Alice is directing the local photons through the short path. When the long path is used it is well known that the beam emerging from filter V1 is not null and in fact has about a quarter of the brightness of the original beam. The beam emerging from V1, being vertically polarized, is then fully absorbed by the subsequent H2 filter. Since 50 percent of the local photons are absorbed by H1 and thus detected as vertical, and yet more of the photons are finally absorbed by H2 and thus detected as vertically polarized, most of the local beam is detected as vertically polarized. Bob should thus at a slightly later time detect most of the conjugates as horizontally polarized. Alice need do no actual photon detection to achieve the communication. Bob need do no individual photon detection to achieve the communication. The communication is achieved by simply measuring beam brightness changes following polarization based separation at Bob's location. This has many advantages in both signal reliability and device cost. An experiment requiring the simplest possible message would involve sending a bit (actually only a change of channel state) via a one-way FTL communication channel and returning it via a second one-way return FTL communication channel, and repeating this process to establish an oscillation. To demonstrate FTL communication it is then necessary to transmit over a sufficient distance D that the oscillation frequency, f, is faster than the oscillation frequency F = c/D that can be achieved by light. A 10 km communication link (each way) need only cycle faster than about 15 kHz to break the light speed barrier. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - End description of my FTL method. Regards, Horace Heffner
