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pro vyhledávání: '"Yoshida, Kyo"'
A method to identify a quantum vortex in a three-dimensional Gross-Pitaevskii simulation has been developed. A quantum vortex was identified by the use of eigenvalues and eigenvectors of the Hessian of the mass density, together with a condition to d
Externí odkaz:
http://arxiv.org/abs/2310.14264
We derive new bounds on a heat current flowing into a quantum $L$-particle system coupled with a Markovian environment. By assuming that a system Hamiltonian and a system-environment interaction Hamiltonian are extensive in $L$, we show that the abso
Externí odkaz:
http://arxiv.org/abs/2209.05789
A quantum battery is a device where an energy is charged by using a quantum effect. Here, we propose a quantum battery with a charger system composed of $N$ qubits by utilizing a collective effect called a superabsorption. Importantly, the coupling s
Externí odkaz:
http://arxiv.org/abs/2205.03823
Autor:
Yoshida, Kyo
Publikováno v:
Physical Review E 106, 045106 (2022)
An ensemble model of turbulence is proposed. The ensemble consists of flow fields in which the flux of an inviscid conserved quantity, such as energy (or enstrophy in two-dimensional flow fields), across the wavenumber $k$ is a constant independent o
Externí odkaz:
http://arxiv.org/abs/2204.02357
Autor:
Ariki, Taketo, Yoshida, Kyo
Self-consistent closure theory for passive-scalar turbulence has been developed on the basis of the Hessian of the scalar field. As a primitive indicator of spatial structure of the scalar, we employ the Hessian into the core of the theory to properl
Externí odkaz:
http://arxiv.org/abs/1909.05482
Autor:
Yoshida, Kyo
Publikováno v:
Phys. Rev. A 101, 032110 (2020)
A way to construct Boltzmann entropy, i.e., the entropy as a function of a microscopic pure state, for quantum field systems is proposed. Operators that shift the field in wavevector space are used in the construction. By employing an assumption, it
Externí odkaz:
http://arxiv.org/abs/1909.00961
Autor:
Yoshida, Kyo1 (AUTHOR) yoshida.kyo.fu@u.tsukuba.ac.jp, Miura, Hideaki2 (AUTHOR), Tsuji, Yoshiyuki3 (AUTHOR)
Publikováno v:
Journal of Low Temperature Physics. Jan2023, Vol. 210 Issue 1/2, p103-112. 10p.
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