Spacetime and Physical Equivalence   Fundamental limits on quantum dynamics based on entropy change. (arXiv:1707.06584v1 [quant-ph])  quant-ph updates on arXiv.org on 2017-7-21 2:13am GMT Authors: Siddhartha Das, Sumeet Khatri, George Siopsis, Mark M. Wilde It is well known in the realm of quantum mechanics and information theory that the entropy is non-decreasing for the class of unital physical processes. However, in general, the entropy... Read more →

Thermodynamics as a Consequence of Information Conservation. (arXiv:1707.01750v1 [quant-ph])  quant-ph updates on arXiv.org on 2017-7-07 8:21am GMT Authors: Manabendra Nath Bera, Arnau Riera, Maciej Lewenstein, Andreas Winter In this work we formulate thermodynamics as an exclusive consequence of information conservation. The framework can be applied to most general situations, beyond the traditional assumptions in thermodynamics, where systems and thermal-baths could be quantum, of arbitrary... Read more →

Simple derivation of the Weyl and Dirac quantum cellular automata  PRA: Quantum information on 2017-6-30 2:00pm GMT Author(s): Philippe Raynal We consider quantum cellular automata on a body-centered cubic lattice and provide a simple derivation of the only two homogenous, local, isotropic, and unitary two-dimensional automata [G. M. D'Ariano and P. Perinotti,Phys. Rev. A 90, 062106 (2014)]. Our derivation relies on... Read more →