We present a detailed analysis of decoherence free subspaces and develop a rigorous theory that provides necessary and sufficient conditions for dynamically stable decoherence free subspaces. This allows us to identify a special class of decoherence free states which rely on incoherent generation of coherences. We provide examples of physical systems that support such states. Our approach employs Markovian master equations and applies primarily to finite-dimensional quantum systems.
|Number of pages||12|
|Journal||Physical Review A - Atomic, Molecular, and Optical Physics|
|Publication status||Published - 2008|
Bibliographical noteRaisa I. Karasik, Karl-Peter Marzlin, Barry C. Sanders, and K. Birgitta Whaley, Physical review A, Vol. 77, Iss. 5, 052301 (2008). Copyright 2008 by the American Physical Society. The original article can be found at http://dx.doi.org/10.1103/PhysRevA.77.052301
- eigenvalues and eigenfunctions
- master equation
- quantum theory