Order from disorder in closed systems via time reversal violation

Details Order from disorder in closed systems via time reversal violation Order from disorder in closed systems via time reversal violation

2012-03-27

arxiv.org/abs/1203.6092v1

EPL 97 (2012) 61003

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 6 PDF figures

Scientific paper

Definitions of entropy usually assume time-reversal (T) invariance of interactions, yet microscopically T is known to be violated. We present a detailed computational example of (uncharged) particle species separation (Maxwell demon) using an interaction that violates both parity (P) and T so that PT is preserved, consistent with the CPT invariance required in quantum field theory (C is charge conjugation). This illustrates how T-violating forces can produce more organized states from disorganized ones, contrary to expectations based on increase of entropy. We also outline several scenarios in which T-violating forces could lead to an organized state in the early Universe, starting from a still earlier disorganized state.

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