Non-Markovian dynamics of a qubit due to single-photon scattering in a waveguide

被引：44
作者：
Fang, Yao-Lung L. [1 ]
Ciccarello, Francesco [1 ,2 ,3 ]
Baranger, Harold U. [1 ]
机构：
[1] Duke Univ, Dept Phys, POB 90305, Durham, NC 27708 USA
[2] Univ Palermo, CNR, Ist Nanosci, NEST, Palermo, Italy
[3] Univ Palermo, Dipartimento Fis & Chim, Palermo, Italy
来源：
NEW JOURNAL OF PHYSICS | 2018年 / 20卷
关键词：
Waveguide QED; open quantum systems; non-Markovianity; quantum optics;
D O I：
10.1088/1367-2630/aaba5d
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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 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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页数：17
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