Necessary and Sufficient Condition on the Lindblad Equation to Prevent Entropy Increase
Abstract
It is shown that in order for the solutions of the Lindblad equation never to give a decreasing von Neumann entropy, it is necessary and sufficient that the operators appearing in this equation should be unitary linear combinations of their adjoints. In this case, these operators may be replaced with Hermitian operators, without changing the evolution of density matrices.
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