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Sudden Transition between Classical and Quantum Decoherence
Tekijät: Mazzola L, Piilo J, Maniscalco S
Kustantaja: AMER PHYSICAL SOC
Julkaisuvuosi: 2010
Journal: Physical Review Letters
Tietokannassa oleva lehden nimi: PHYSICAL REVIEW LETTERS
Lehden akronyymi: PHYS REV LETT
Artikkelin numero: ARTN 200401
Numero sarjassa: 20
Vuosikerta: 104
Numero: 20
Sivujen määrä: 4
ISSN: 0031-9007
DOI: https://doi.org/10.1103/PhysRevLett.104.200401
Tiivistelmä
We study the dynamics of quantum and classical correlations in the presence of nondissipative decoherence. We discover a class of initial states for which the quantum correlations, quantified by the quantum discord, are not destroyed by decoherence for times t < <(t)over bar>. In this initial time interval classical correlations decay. For t > (t) over bar, on the other hand, classical correlations do not change in time and only quantum correlations are lost due to the interaction with the environment. Therefore, at the transition time (t) over bar the open system dynamics exhibits a sudden transition from classical to quantum decoherence regime.
We study the dynamics of quantum and classical correlations in the presence of nondissipative decoherence. We discover a class of initial states for which the quantum correlations, quantified by the quantum discord, are not destroyed by decoherence for times t < <(t)over bar>. In this initial time interval classical correlations decay. For t > (t) over bar, on the other hand, classical correlations do not change in time and only quantum correlations are lost due to the interaction with the environment. Therefore, at the transition time (t) over bar the open system dynamics exhibits a sudden transition from classical to quantum decoherence regime.
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