Dynamics of quantum tomography in an open system
Dynamics of quantum tomography in an open system
复制标题
开放系统中量子层析成像的动力学
DOI:
10.1088/0031-8949/90/7/074064
复制
发表时间:
2015
期刊:
影响因子:
2.9
通讯作者:
Chikako Uchiyama
中科院分区:
文献类型:
--
作者:
Kobashi F.;Y. Onikata;N. Iwasaka;Y. Kawai;E. Oka;K. Uehara;S. Ito;M. Odamaki;and H. Sasaki;Chikako Uchiyama
In this study, we provide a way to describe the dynamics of quantum tomography in an open system with a generalized master equation, considering a case where the relevant system under tomographic measurement is influenced by the environment. We apply this to spin tomography because such situations typically occur in μSR (muon spin rotation/relaxation/resonance) experiments where microscopic features of the material are investigated by injecting muons as probes. As a typical example to describe the interaction between muons and a sample material, we use a spin-boson model where the relevant spin interacts with a bosonic environment. We describe the dynamics of a spin tomogram using a time-convolutionless type of generalized master equation that enables us to describe short time scales and/or low-temperature regions. Through numerical evaluation for the case of Ohmic spectral density with an exponential cutoff, a clear interdependency is found between the time evolution of elements of the density operator and a spin tomogram. The formulation in this paper may provide important fundamental information for the analysis of results from, for example, μSR experiments on short time scales and/or in low-temperature regions using spin tomography.
登录
查看更多内容
DOI:
10.1016/j.physleta.2004.05.007
发表时间:
2004
影响因子:
3.3
作者:
V. Man'ko;G. Marmo;E. Sudarshan;F. Zaccaria
通讯作者:
F. Zaccaria
影响因子:
0.9
作者:
Y. Belousov;S. Filippov;V. N. Gorelkin;V. Man'ko
通讯作者:
V. Man'ko
影响因子:
2.9
作者:
M. Asorey;P. Facchi;V. Man’ko;G. Marmo;S. Pascazio;E. Sudarshan
通讯作者:
E. Sudarshan
影响因子:
1.5
作者:
Mancini, S;Manko, VI;Tombesi, P
通讯作者:
Tombesi, P
影响因子:
1.7
作者:
F. Shibata;Chikako Uchiyama
通讯作者:
Chikako Uchiyama