The Universal Arrow of Time

  title={The Universal Arrow of Time},
  author={Oleg Kupervasser and Hrvoje Nikoli{\'c} and Vinko Zlatic},
  journal={Foundations of Physics},
Statistical physics cannot explain why a thermodynamic arrow of time exists, unless one postulates very special and unnatural initial conditions. Yet, we argue that statistical physics can explain why the thermodynamic arrow of time is universal, i.e., why the arrow points in the same direction everywhere. Namely, if two subsystems have opposite arrow-directions at a particular time, the interaction between them makes the configuration statistically unstable and causes a decay towards a system… 
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The Time-symmetric Gold Universe Reconsidered
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Quantum solution to the arrow-of-time dilemma.
  • L. Maccone
  • Physics, Education
    Physical review letters
  • 2009
It is shown that, within a quantum mechanical framework, all phenomena which leave a trail of information behind are those where entropy necessarily increases or remains constant, and physics cannot study those processes where entropy has decreased, even if they were commonplace.
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I acknowledge a flaw in the paper "A quantum solution to the arrow of time dilemma": as pointed out by Jennings and Rudolph, (classical) mutual information is not an appropriate measure of
Comment on "Quantum solution to the arrow-of-time dilemma".
The argument is shown that the argument is incomplete and furthermore, by providing a counter-example, it is argued that it is incorrect.
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