Local hidden variables theories didn't succeed to explain the correlations revealed by entanglements. It is obvious that the explanation of the correlations stands in non-local effects, but nobody has ever detected any carriers that travel with superluminal velocity s.t. they could candidate for some superluminal connection between distant particles, in order to adjust the results to the correlations. This text explains that the role of creating the correlations is played by what is called here the "Negative". This is the part that was removed from the wave function of the independent particles, in order to obtain the entanglement. As it is shown here, for du-particle experiments the Negative consists in du-particle wave-packets. They enter both regions where the particles are tested, s.t. the Negative "knows" the response given by one particle, and erases the possibilities of forbidden responses from the other particle.
Local hidden variables theories didn't succeed to explain the correlations revealed by entanglements. It is obvious that the explanation of the correlations stands in non-local effects, but nobody has ever detected any carriers that travel with superluminal velocity s.t. they could candidate for some superluminal connection between distant particles, in order to adjust the results to the correlations. This text explains that the role of creating the correlations is played by what is called here the "Negative". This is the part that was removed from the wave function of the independent particles, in order to obtain the entanglement. As it is shown here, for du-particle experiments the Negative consists in du-particle wave-packets. They enter both regions where the particles are tested, s.t. the Negative "knows" the response given by one particle, and erases the possibilities of forbidden responses from the other particle.
The local hidden variable assumption was repeatedly proved unable to explain results of experiments in which contextuality is involved. Then, the correlated results of measurements of entangled particles, began to be attributed to a communication between particles through so-called "signals". These "signals" need to possess superluminal velocity or move backward in time. No object that has a rest-mass, not even the photons whose rest mass is zero, behave this way. Still, as the nature of the presumed "sinals" is not known, people don't reject the idea, despite the conflict with the theory of relativity. For this reason, the present article examines the "signals" from another point of view: wherever runs a communication, there has also to exist a communication protocol. The article tries to outline a communication protocol between the space-separated, entangled particles, and comes to a contradiction, making the idea of such a communication highly doubtable.
As shown in the famous EPR paper (Einstein, Podolsky e Rosen, 1935), Quantum Mechanics is non-local. The Bell theorem and the experiments by Aspect and many others, ruled out the possibility of explaining quantum correlations between entangled particles using local hidden variables models (except for implausible combinations of loopholes). Some authors (Bell, Eberhard, Bohm and Hiley) suggested that quantum correlations could be due to superluminal communications (tachyons) that propagate isotropically with velocity v t > c in a preferred reference frame. For finite values of v t , Quantum Mechanics and superluminal models lead to different predictions. Some years ago a Geneva group and our group did experiments on entangled photons to evidence possible discrepancies between experimental results and quantum predictions. Since no discrepancy was found, these experiments established only lower bounds for the possible tachyon velocities v t . Here we propose an improved experiment that should lead us to explore a much larger range of possible tachyon velocities V t for any possible direction of velocity of the tachyons preferred frame.
The local hidden variable assumption was repeatedly proved unable to explain results of experiments in which contextuality is involved. Then, the correlated results of measurements of entangled particles, began to be attributed to a communication between particles through so-called signals. These signals need to possess superluminal velocity or move backward in time. No object that has a rest-mass, not even the photons whose rest mass is zero, behave this way. Still, as the nature of the presumed sinals is not known, people don't reject the idea, despite the conflict with the theory of relativity. For this reason, the present article examines the signals from another point of view: wherever runs a communication, there has also to exist a communication protocol. The article tries to outline a communication protocol between the space-separated, entangled particles, and comes to a contradiction, making the idea of such a communication highly doubtable.
As shown in the EPR paper (Einstein, Podolsky e Rosen, 1935), Quantum Mechanics is a non-local Theory. The Bell theorem and the successive experiments ruled out the possibility of explaining quantum correlations using only local hidden variables models. Some authors suggested that quantum correlations could be due to superluminal communications that propagate isotropically with velocity v t > c in a preferred reference frame. For finite values of v t and in some special cases, Quantum Mechanics and superluminal models lead to different predictions. So far, no deviations from the predictions of Quantum Mechanics have been detected and only lower bounds for the superluminal velocities v t have been established. Here we describe a new experiment that increases the maximum detectable superluminal velocities and we give some preliminary results.
Two statements in physics are frequently conflated: that nothing can travel faster than light, and that two entangled particles behave as if "instantaneously" connected regardless of their separation. This paper addresses both questions together: whether a faster-than-light particle could exist and, if so, whether it would count as matter; and whether quantum entanglement actually violates the light-speed limit. Starting from the energy–velocity relation of special relativity, it is shown that massive particles cannot reach the speed of light, and the properties of hypothetical tachyons (imaginary mass, absence of a rest frame and violation of causality) are examined. Using the singlet state, the non-separability, reduced state and correlation properties of entanglement are derived, and the quantum violation of the CHSH inequality up to 2√2 is computed. Finally, via the no-signaling theorem, it is shown that entanglement produces non-local correlations without permitting superluminal communication. In conclusion, nature accommodates non-local correlations without allowing any object to travel faster than light.
Quantum mechanics is a non local theory. To recover the locality principle some physicists suggested that the correlations between entangled particles could be established by communications propagating with a velocity v t > c in a preferred frame. In the previous DICE conference we reported the preliminary results of a high sensitivity experiment to test the superluminal models. Here we report the final results. No breaking of the quantum predictions has been found. Then, we infer that the velocity of the quantum communications has to be higher than a lower bound of the order of some millions of times the light velocity.