Volume 97, Number 6, March 2012
|Number of page(s)||6|
|Section||The Physics of Elementary Particles and Fields|
|Published online||22 March 2012|
Order from disorder in closed systems via time-reversal violation
Theoretical Division, Los Alamos National Laboratory - Los Alamos, NM 87545, USA
Accepted: 25 February 2012
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.
PACS: 11.30.Er – Charge conjugation, parity, time reversal, and other discrete symmetries / 98.80.Cq – Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.) / 98.80.-k – Cosmology
© EPLA, 2012
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