It reminds me of another paper that was discussed here earlier (I can't find the submission, though):
A quantum solution to the arrow-of-time dilemma—Lorenzo Maccone
The arrow of time dilemma: the laws of physics are
invariant for time inversion, whereas the familiar
phenomena we see everyday are not (i.e. entropy
increases). I show that, within a quantum mechanical
framework, all phenomena which leave a trail of
information behind (and hence can be studied by
physics) are those where entropy necessarily increases
or remains constant. All phenomena where the entropy
decreases must not leave any information of their
having happened. This situation is completely
indistinguishable from their not having happened at
all. In the light of this observation, the second law
of thermodynamics is reduced to a mere tautology:
physics cannot study those processes where entropy has
decreased, even if they were commonplace.
Phys. Rev. Lett. 103, 080401 – Published 17 August 2009
A quantum solution to the arrow-of-time dilemma—Lorenzo Maccone
Phys. Rev. Lett. 103, 080401 – Published 17 August 2009http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.103... – http://arxiv.org/abs/0802.0438