**:**the experimental particle location in one place is a WF-C that replaces the plane wave by a new WF with zero location in all other places – it is because of conservation of the number of particles. It means simultaneous prediction with confidence of negative search results at any other far place where the particle could have been detected before the WF-Collapse. Another example, much discussed in the literature, is entanglement of two spin states of separated in space electrons

**:**detecting the spin of one particle leads to collapse of the two-particle wave function by replacing it with a new wave function that describes definite spins of each of the two electrons – it is because of conservation of the angular momentum of total spin. It means exact prediction of the far particle spin. The reason of entanglement of the two spin states is the initial two-particle wave function. Its collapse reveals the result of that entanglement.

Nonlocality and action at distance in quantum mechanics is not a bit more strange than the other more known nonclassical features of quantum reality such as “the particle exists simultaneously in different places, particle-wave duality” and the likes. All these “spooky” images are appearing in the classical world only because the relations of the manifestations of quantum reality are described by inadequate classical terms. The adequate description of quantum reality is by the Great Physical Idea of Wave Function. Its wave-like essence is not just a math feature, but describes real nonlocal nature of quantum reality as medium in all the mentioned nonclassical effects especially in the popular now phenomena of quantum entanglement. It appears that quantum medium really exists as basic natural phenomenon. It is observable at different space points. Those predictions are experimentally verifiable though in a new quantum probabilistic manner as predicted by the wave function by local experiments with classical means and skillful classical hands of the experimental physicists.

Hence quantum medium is predicted by quantum mechanics; it is described by the wave function and it is observable by classical experiments in every point of space. This quantum medium is not local in space and as such violates Einstein’s relativity. But at the physical level of classical experimental results in general and particular in quantum entanglement phenomena Einstein’s relativity is necessarily exact. The nonlocality is a quantum effect. This related to relativity duality is not spooky. Non-classical quantum mediation of the classical manifestations in entanglement phenomena is one of the natural wonders of quantum mechanics.

Is the new idea “quantum medium” a useful one in quantum phenomenology?

Quantum Medium is something that parallels in the real world the math description by wave function; it is the predicted by quantum mechanics existing in 3-space nonlocal reality described by wave function. But in addition to the concept 'quantum reality' the new concept 'quantum medium' emphasizes the not classical mediating function of that reality between its classical manifestations at different locations in 3-space especially as it is in the phenomena of quantum entanglement. So, the answer to the above question is a likely “yes”.

Normal 0 MicrosoftInternetExplorer4 The idea of nonlocal Quantum Medium is formally close to suggested by Einstein (EPR article) solution of quantum spookiness problem by some ‘hidden physics’. But before claiming ultimate nonlocality in quantum mechanics it seems worth to measure the speed v of the correlation effect in quantum entanglement experiments – to see if it is not finite, though much larger than the speed of light v >> c. Such measurements seem feasible by exact time reading and distance measure in the entanglement correlation experiments. Finite speed of information transfer by quantum medium, if confirmed indeed, would be an almost full realization of Einstein’s EPR-idea by introduction of a new, unknown in classical physics, concept of tachyonic medium in quantum mechanics. /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman";}

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