Local-time representation of path integrals.
Local-time representation of path integrals.
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路径积分的本地时间表示
DOI:
10.1103/physreve.92.062137
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
V. Zatloukal
中科院分区:
文献类型:
--
作者:
P. Jizba;V. Zatloukal
We derive a local-time path-integral representation for a generic one-dimensional time-independent system. In particular, we show how to rephrase the matrix elements of the Bloch density matrix as a path integral over-dependent local-time profiles. The latter quantify the time that the sample pathsin the Feynman path integral spend in the vicinity of an arbitrary point. Generalization of the local-time representation that includes arbitrary functionals of the local time is also provided. We argue that the results obtained represent a powerful alternative to the traditional Feynman-Kac formula, particularly in the high- and low-temperature regimes. To illustrate this point, we apply our local-time representation to analyze the asymptotic behavior of the Bloch density matrix at low temperatures. Further salient issues, such as connections with the Sturm-Liouville theory and the Rayleigh-Ritz variational principle, are also discussed.
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DOI:
10.1088/0305-4470/28/23/032
发表时间:
1995
期刊:
Journal of Physics A
影响因子:
--
作者:
A. McKane;M. Tarlie
通讯作者:
M. Tarlie
DOI:
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1985
期刊:
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作者:
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通讯作者:
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1969
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DOI:
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发表时间:
2013
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
作者:
P. Jizba;Václav Zatloukal
通讯作者:
Václav Zatloukal
DOI:
--
发表时间:
2002
期刊:
影响因子:
--
作者:
J. Mur;A. Polls;F. Mazzanti
通讯作者:
F. Mazzanti