Non-Markovian Dynamics of a Qubit Due to Single-Photon Scattering in a Waveguide
| Autor: | Fang, Yao-Lung L., Ciccarello, Francesco, Baranger, Harold U. |
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| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | New J. Phys. 20, 043035 (2018) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/1367-2630/aaba5d |
| Popis: | 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. Comment: Integrated the supplementary material into main text and added the discussion on P-/CP-divisibility. To appear in New Journal of Physics |
| Databáze: | arXiv |
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