A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Non-Markovianity of local dephasing channels and time-invariant discord
Tekijät: Haikka P, Johnson TH, Maniscalco S
Kustantaja: AMER PHYSICAL SOC
Julkaisuvuosi: 2013
Journal: Physical Review A
Tietokannassa oleva lehden nimi: PHYSICAL REVIEW A
Lehden akronyymi: PHYS REV A
Artikkelin numero: ARTN 010103
Numero sarjassa: 1
Vuosikerta: 87
Numero: 1
Sivujen määrä: 5
ISSN: 1050-2947
DOI: https://doi.org/10.1103/PhysRevA.87.010103
Tiivistelmä
We study non-Markovianity and information flow for qubits experiencing local dephasing with an Ohmic class spectrum. We demonstrate the existence of a temperature-dependent critical value of the Ohmicity parameters for the onset of non-Markovianity and give a physical interpretation of this phenomenon by linking it to the form of the reservoir spectrum. We demonstrate that this link holds also for more general spectra. We unveil a class of initial states for which discord is forever frozen at a positive value. We connect time-invariant discord to non-Markovianity and propose a physical system in which it could be observed. DOI: 10.1103/PhysRevA.87.010103
We study non-Markovianity and information flow for qubits experiencing local dephasing with an Ohmic class spectrum. We demonstrate the existence of a temperature-dependent critical value of the Ohmicity parameters for the onset of non-Markovianity and give a physical interpretation of this phenomenon by linking it to the form of the reservoir spectrum. We demonstrate that this link holds also for more general spectra. We unveil a class of initial states for which discord is forever frozen at a positive value. We connect time-invariant discord to non-Markovianity and propose a physical system in which it could be observed. DOI: 10.1103/PhysRevA.87.010103
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