Zobrazeno 1 - 10
of 129
pro vyhledávání: '"Fumiaki Shibata"'
Publikováno v:
Physical Review A. 97
Publikováno v:
Physical Review A. 95
A linear response theory for open quantum systems is formulated by means of the time-local and time-nonlocal quantum master equations, where a relevant quantum system interacts with a thermal reservoir as well as with an external classical field. A l
Publikováno v:
Journal of Modern Optics. 61:582-607
Quadrature operators with arbitrary phase are studied from a point of view of the phase-space representation of quantum states, and the results are applied to simultaneous measurement and quantum communication. The Wigner function of arbitrary phase
Autor:
Natsuki Hashitsume, Fumiaki Shibata
Publikováno v:
Progress of Theoretical Physics Supplement. 69:55-68
The quantal Maxwell·Langevin equations for electromagnetic field operators are derived by means of the theory of Langevin equation recently developed by the authors, and by assuming that a substance coupled with the electro magnetic field is in th
Publikováno v:
International Journal of Theoretical Physics. 51:2419-2426
The time-evolution of the trace distance between two qubit states in the presence of an initial correlation with an environment is investigated by means of the exactly solvable model of qubit and environmental system, where there is at most one excit
Publikováno v:
Physics Letters A. 375:2283-2290
Decoherence of a qubit system interacting with a bosonic reservoir is considered when there is at most one excitation in the whole system and there is an initial correlation with the reservoir. An exact time-evolution of the system is obtained and th
Publikováno v:
Physics Letters A. 374:2324-2330
An exact reduced density operator of a quantum system interacting with a bosonic thermal reservoir is derived by means of the simple algebraic method. The necessary and sufficient condition is found that the time-convolutionless master equation becom
Publikováno v:
Physics Letters A. 373:3614-3618
It is shown that the dephasing of a qubit caused by a Markov process can be suppressed by a successive application of π-pulses if two-time conditional probability of the stochastic variable depends only on the time-difference. The several types of t
Publikováno v:
Physics Letters A. 373:2311-2318
The boson-detector model is generalized to investigate the decay of two-particle coherence. It is found from the visibility of the two-particle interferometer that the detector system not only destructs the coherence but also creates the correlation
Publikováno v:
Journal of Modern Optics. 56:89-97
Complementarity of wave-like and particle-like properties in the Mach–Zehnder and Michelson interferometers is investigated by means of the exactly solvable model for a quantum measurement process. When the error-minimum measurement and unambiguous