Transition from Quantum to Classical Information in a Superfluid

Details Transition from Quantum to Classical Information in a Superfluid Transition from Quantum to Classical Information in a Superfluid

2003-02-03

arxiv.org/abs/quant-ph/0302013v2

Physics

Quantum Physics

11 pages, 4 figures

Scientific paper

10.1016/S0375-9601(03)00370-0

Whereas the entropy of any deterministic classical system described by a principle of least action is zero, one can assign a "quantum information" to quantum mechanical degree of freedom equal to Hausdorff area of the deviation from a classical path. This raises the question whether superfluids carry quantum information. We show that in general the transition from the classical to quantum behavior depends on the probing length scale, and occurs for microscopic length scales, except when the interactions between the particles are very weak. This transition explains why, on macroscopic length scales, physics is described by classical equations.

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