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pro vyhledávání: '"Ban, Masashi"'
Autor:
Azuma, Hiroo, Ban, Masashi
Publikováno v:
Eur. Phys. J. D (2021) 75:167
We show that in some cases the coherent state can have a larger violation of the Leggett-Garg inequality (LGI) than the cat state by numerical calculations. To achieve this result, we consider the LGI of the cavity mode weakly coupled to a zero-tempe
Externí odkaz:
http://arxiv.org/abs/2101.06866
Akademický článek
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Autor:
Azuma, Hiroo, Ban, Masashi
Publikováno v:
Int. J. Quantum Inf. 19(1), 2150010 (2021)
We investigate the security against the intercept/resend and translucent attacks on the quantum key distribution protocol based on the pre- and post-selection effect. In 2001, Bub proposed the quantum cryptography scheme, which was an application of
Externí odkaz:
http://arxiv.org/abs/1811.07282
Autor:
Azuma, Hiroo, Ban, Masashi
Publikováno v:
Eur. Phys. J. D (2018) 72: 187
We investigate the Leggett-Garg inequalities and the relative entropy of coherence in the Bixon-Jortner model. First, we analytically derive the general solution of the Bixon-Jortner model by a technique of the Laplace transform. So far, only a speci
Externí odkaz:
http://arxiv.org/abs/1803.01303
Autor:
Azuma, Hiroo, Ban, Masashi
Publikováno v:
Physica D 308 (2015) 127-135
In this paper, we show that the time evolution of the Bloch vector governed by the thermal Jaynes-Cummings model is equivalent to a compressible inviscid flow with zero vorticity. Because of its quasiperiodicity, the dynamics of the Bloch vector incl
Externí odkaz:
http://arxiv.org/abs/1407.3376
Autor:
Azuma, Hiroo, Ban, Masashi
Publikováno v:
J. Mod. Opt. 62, 1081-1090 (2015)
In this paper, we investigate a thermal coherent state defined with the Lie-Trotter product formula under the formalism of the thermo field dynamics. In the definition of our thermal coherent state, we treat the thermalizing operator and the displace
Externí odkaz:
http://arxiv.org/abs/1312.7261
Autor:
Azuma, Hiroo, Ban, Masashi
Publikováno v:
Physica D 280-281 (2014) 22-37
We study a quasiperiodic structure in the time evolution of the Bloch vector, whose dynamics is governed by the thermal Jaynes-Cummings model (JCM). Putting the two-level atom into a certain pure state and the cavity field into a mixed state in therm
Externí odkaz:
http://arxiv.org/abs/1205.4308
Autor:
Ban, Masashi1 (AUTHOR) ban.masashi@ocha.ac.jp
Publikováno v:
Quantum Information Processing. Nov2022, Vol. 21 Issue 11, p1-11. 11p.
Autor:
Azuma, Hiroo, Ban, Masashi
Publikováno v:
Int. J. Mod. Phys. C 22, 1015-1062 (2011)
In this paper, we investigate thermal effects of the Jaynes-Cummings model (JCM) at finite temperature with a perturbative approach. We assume a single two-level atom and a single cavity mode to be initially in the thermal equilibrium state and the t
Externí odkaz:
http://arxiv.org/abs/1103.3612
Autor:
Azuma, Hiroo, Ban, Masashi
Publikováno v:
J. Mod. Opt. 57, 677-684 (2010); J. Mod. Opt. 57, 2203 (2010)
In this paper, we show a direct method of deriving the Peres-Horodecki criterion for the two-qubit states from the Hill-Wootters formula for the entanglement of formation. Although the Peres-Horodecki criterion and the Hill-Wootters formula are estab
Externí odkaz:
http://arxiv.org/abs/0910.3822