On Quantum Entanglement

EPJ Web of Conferences, 2013

The theory of Quantum Mechanics is one of the mainstay of modern physics, a wellestablished mathematical clockwork whose strength and accuracy in predictions are currently experienced in worldwide research laboratories. As a matter of fact, Quantum Mechanics laid the groundwork of a rich variety of studies ranging from solid state physics to cosmology, from bio-physics to particle physics. The up-to-date ability of manipulating single quantum states is paving the way for emergent quantum technologies as quantum information and computation, quantum communication, quantum metrology and quantum imaging. In spite of the impressive matemathical capacity, a long-standing debate is even revolving around the foundational axioms of this theory, the main bones of content being the non-local eects of entangled states, the wave function collapse and the concept of measurement in Quantum Mechanics, the macro-objectivation problem (the transition from a microscopic probabilistic world to a macroscopic deterministic world described by classical mechanics). Problems that, beyond their fundamental interest in basic science, now also concern the impact of these developing technologies. Without claiming to be complete, this article provides in outline the living matter concerning some of these problems, the implications of which extend deeply on the connection between entanglement and space-time structure. a

The purposes of the present article are: a) To show that non-locality leads to the transfer of certain amounts of energy and angular momentum at very long distances, in an absolutely strange and unnatural manner, in any model reproducing the quantum mechanical results. b) To prove that non-locality is the result only of the zero spin state assumption for distant particles, which explains its presence in any quantum mechanical model. c) To reintroduce locality, simply by denying the existence of the zero spin state in nature (the so-called highly correlated, or EPR singlet state) for particles non-interacting with any known field. d) To propose a realizable experiment to clarify if two remote (and thus non-interacting with a known field) particles, supposed to be correlated as in Bell-type experiments, are actually in zero spin state.

Physics Essays

In a recent Nature article, Hensen et al. reported that they have accomplished a "loophole-free" test of Bell's theorem. The authors speculated that further improvements in their experimental design could settle an 80 years debate in favor of quantum theory's stance that entanglement is "action at a distance". We direct attention to a spatial aspect of locality, not considered by Bell's Theorem nor by any of its experimental tests. We refer to the possibility that two particles distancing from each other could remain spatially disconnected, even when they have distanced enough to ensure that information between them was transmitted faster than the velocity of light. We show that any local-deterministic relativity theory which violates Lorentz's contraction for distancing bodies can maintain spatial locality. We briefly note that the recently proposed Information Relativity Theory satisfies the aforementioned condition, and that it predicts and explains several quantum phenomena, despite being local and deterministic. We conclude by arguing that quantum entanglement is not nonlocal and that the unnoticed spatial dimension of locality is in fact the hidden variable conjectured in the seminal EPR paper.

In a recent Nature article Hensen et al. (2015) reported that they have accomplished a "loophole-free" test of Bell's theorem. The authors speculated that further improvements in their experimental design could settle an 80 year debate in favor of quantum theory's stance that entanglement is "action at a distance". We direct attention to a spatial aspect of locality, not considered by Bell's Theorem or by any of its experimental tests. We refer to the possibility that two distanced particles could remain spatially disconnected, even when distanced enough to ensure that information between them was transmitted faster than the velocity of light. We show that any local-deterministic relativity theory which violates Lorentz's contraction for distancing bodies can maintain spatial locality at any distance. We conclude that until the loophole of spatial locality is closed by future experiments, the news about the death of locality will remain greatly exaggerated.

A simple explanation is given for the continuation of the singlet state over large distances in an EPRBA experiment. The paper answers this question with clocks ticking in synchronized frequencies that can be carried by the particles. The connection is an expression of relativity of the clock variables that represent the distant separated spins. PACS numbers: 03.65 Ud, 03.65 Pm

2012

Based on our model of quantum systems as emerging from the coupled dynamics between oscillating "bouncers" and the space-filling zero-point field, a sub-quantum account of nonlocal correlations is given. This is explicitly done for the example of the "double two-slit" variant of two-particle interferometry. However, it is also shown that the entanglement in two-particle interferometry is only a natural consequence of the fact that already a "single" two-slit experiment can be described on a sub-quantum level with the aid of "entangling currents" of a generally nonlocal nature.

2017

Since his famous discussions with Niels Bohr, Albert Einstein considered quantum entanglement (QE) as a spooky action at a distance, due to the violation of locality necessary so that two entangled particles can share this effect in an instantaneous way despite of being at a great distance from each other, i.e., not being local. In other words, a notification about the change of state in one of them could only cover the space that separates them at a speed superior to that of light, which we know is impossible according to the Theory of Relativity (TR). Besides, QE faces directly the two main pillars of Physics: TR and Quantum Theory (QT); becoming the bone of contention between both theories. Quite the contrary, in this work we will see that QE is the meeting point of both theories, so much so, that QE could be considered as the cornerstone of the Theory of Everything (TOE). Consistent with this, the entangled particles retain certain autonomy unknown to date, and in addition, they...

Foundations of Science, 2021

and the United States, to animate an interdisciplinary dialogue about fundamental issues of science and society. 'Entanglement' is a genuine quantum phenomenon, in the sense that it has no counterpart in classical physics. It was originally identified in quantum physics experiments by considering composite entities made up of two (or more) sub-entities which have interacted in the past but are now sufficiently distant from each other. If joint measurements are performed on the sub-entities when the composite entity is in an 'entangled state', then the sub-entities exhibit, despite their spatial separation, statistical correlations (expressed by the violation of 'Bell inequalities') which cannot be represented in the formalism of classical physics.