The European Physical Journal Special Topics

, Volume 160, Issue 1, pp 391–397 | Cite as

Generic dissipation of entanglement

  • A. Solomon
Article

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).

Keywords

Entangle State European Physical Journal Special Topic Bell State Maximal Entanglement Dephasing Rate 

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Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2008

Authors and Affiliations

  • A. Solomon
    • 1
  1. 1.Open University, UK and Paris University VIPARISFrance

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