6533b7d2fe1ef96bd125eb2b
RESEARCH PRODUCT
Non-Markovian Dynamics of a Qubit Due to Single-Photon Scattering in a Waveguide
Yao-lung L. FangHarold U. BarangerFrancesco CiccarelloFrancesco Ciccarellosubject
---PhotonWave packetGeneral Physics and AstronomyFOS: Physical sciencesWaveguide QED; open quantum systems; non-Markovianity; quantum optics01 natural sciences010305 fluids & plasmasQuantum mechanics0103 physical sciencesMaster equationMesoscale and Nanoscale Physics (cond-mat.mes-hall)Waveguide (acoustics)quantum optics010306 general physicsQuantumPhysicsQuantum opticsopen quantum systemQuantum PhysicsCondensed Matter - Mesoscale and Nanoscale PhysicsScatteringnon-MarkovianityQubitWaveguide QEDQuantum Physics (quant-ph)Physics - OpticsOptics (physics.optics)description
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 qubit's dynamical map. Tools of open quantum systems theory allow us then to discuss 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-01-01 |