A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Non-Markovian dynamics in two-qubit dephasing channels with an application to superdense coding
Tekijät: Karlsson A, Lyyra H, Laine EM, Maniscalco S, Piilo J
Kustantaja: AMER PHYSICAL SOC
Julkaisuvuosi: 2016
Journal: Physical Review A
Tietokannassa oleva lehden nimi: PHYSICAL REVIEW A
Lehden akronyymi: PHYS REV A
Artikkelin numero: ARTN 032135
Vuosikerta: 93
Numero: 3
Sivujen määrä: 7
ISSN: 2469-9926
eISSN: 2469-9934
DOI: https://doi.org/10.1103/PhysRevA.93.032135
We study the performance of two measures of non-Markovianity in detecting memory effects in two-qubit dephasing channels. By combining independent Markovian and non-Markovian noise on the qubits, our results show that the trace distance measure is able to detect the memory effects when at least one of the local channels displays non-Markovianity. A measure based on channel capacity, in turn, becomes nonzero when the global two-qubit dynamics shows memory effects. We apply these schemes to a well-known superdense coding protocol and demonstrate an optimal noise configuration to maximize the information transmission with independent local noises.
Ladattava julkaisu This is an electronic reprint of the original article. |