Complete positivity, finite-temperature effects, and additivity of noise for time-local qubit dynamics
Henri Lyyra; Juho Lankinen; and Sabrina Maniscalco; Babak Ziaei; Jose Teittinen; Boris Sokolov
Complete positivity, finite-temperature effects, and additivity of noise for time-local qubit dynamics
Henri Lyyra
Juho Lankinen
and Sabrina Maniscalco
Babak Ziaei
Jose Teittinen
Boris Sokolov
American Phyiscal Society
Julkaisun pysyvä osoite on:
https://urn.fi/URN:NBN:fi-fe2021042715848
https://urn.fi/URN:NBN:fi-fe2021042715848
Tiivistelmä
We present a general model of qubit dynamics which entails pure
dephasing and dissipative time-local master equations. This allows us to
describe the combined effect of thermalization and dephasing beyond the
usual Markovian approximation. We investigate the complete positivity
conditions and introduce a heuristic model that is always physical and
provides the correct Markovian limit. We study the effects of
temperature on the non-Markovian behavior of the system and show that
the noise additivity property discussed by Yu and Eberly [Phys. Rev. Lett. 97, 140403 (2006)] holds beyond the Markovian limit.
Kokoelmat
- Rinnakkaistallenteet [19207]