Non-Markovian Dynamics of a Qubit Due to Single-Photon Scattering in a Waveguide
Abstract
We investigate the open dynamics of a qubit due to scattering of a single photon in
an infinite or semi-infinite waveguide. Through an exact solution of the time-dependent
multi-photon scattering problem, we find the qubitʼs dynamical map. Tools of open
quantum systems theory allow us then to show the general features of this map, find
the corresponding non-Linbladian master equation, and assess in a rigorous way its
non-Markovian nature. The qubit dynamics has distinctive features that, in particular,
do not occur in emission processes. Two fundamental sources of non-Markovianity are
present: the finite width of the photon wavepacket and the time delay for propagation
between the qubit and the end of the semi-infinite waveguide.
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Journal articlePermalink
https://hdl.handle.net/10161/26453Published Version (Please cite this version)
10.1088/1367-2630/aaba5dPublication Info
(2018). Non-Markovian Dynamics of a Qubit Due to Single-Photon Scattering in a Waveguide.
New Journal of Physics, 20(4). pp. 043035-043035. 10.1088/1367-2630/aaba5d. Retrieved from https://hdl.handle.net/10161/26453.This is constructed from limited available data and may be imprecise. To cite this
article, please review & use the official citation provided by the journal.
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Show full item recordScholars@Duke
Harold U. Baranger
Professor of Physics
The broad focus of Prof. Baranger's group is quantum open systems at the nanoscale,
particularly the generation of correlation between particles in such systems. Fundamental
interest in nanophysics-- the physics of small, nanometer scale, bits of solid-- stems
from the ability to control and probe systems on length scales larger than atoms but
small enough that the averaging inherent in bulk properties has not yet occurred.
Using this ability, entirely unanticipated phenomena ca
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