Generic dissipation of entanglement

Solomon, Allan (2008). Generic dissipation of entanglement. European Physical Journal - Special Topics, 160(1) pp. 391–397.

DOI: https://doi.org/10.1140/epjst/e2008-00742-7

Abstract

We find states for a multi-level system which are stable under a very general model of dissipation, one which is governed simply by generic rate parameters; in general such stable states are not entangled. We exhibit such a state explicitly for a two-qubit system. We then specialize to a more physical model of dissipation, one which is governed by pure dephasing. In such a case it is possible, by choice of the dephasing rates, to have a stable, and limiting, entangled state under the evolution governed by the free hamiltonian and pure decoherence. We exhibit such a choice explicitly which has a stable and limiting two-qubit state of maximum entanglement (Bell state).

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