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Frozen discord in non-Markovian depolarizing channels | | L. Mazzola
; J. Piilo
; S. Maniscalco
; | | Date: |
9 Jun 2010 | | Abstract: | We investigate the dynamics of quantum and classical correlations in a system
of two qubits under local colored-noise depolarizing channels. The time
evolution of a single qubit interacting with its own environment is described
by a memory kernel non-Markovian master equation. The memory effects of the
non-Markovian reservoirs introduce new features in the dynamics of quantum and
classical correlations compared to the white noise Markovian case. Depending on
the geometry of the initial state the system can exhibit frozen discord and
multiple sudden transitions between classical and quantum decoherence [L.
Mazzola, J. Piilo, S. Maniscalco, Phys.Rev.Lett. extbf{104}, 200401 (2010)].
We provide a geometric interpretation of those phenomena in terms of the
distance of the state under investigation to its closest classical state in the
Hilbert space of the system. | | Source: | arXiv, 1006.1805 | | Services: | Forum | Review | PDF | Favorites | |
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