Zobrazeno 1 - 10
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pro vyhledávání: '"KOIDE, T."'
In this study, we explore a form of quantum circuit complexity that extends to open systems. To illustrate our methodology, we focus on a basic model where the projective Hilbert space of states is depicted by the set of orientations in the Euclidean
Externí odkaz:
http://arxiv.org/abs/2410.03391
Autor:
Nicacio, F., Koide, T.
Publikováno v:
Physical Review E, 110, 054116 (2024)
The ultimate goal of this paper is to develop a systematic method for deriving quantum master equations that satisfy the requirements of a completely positive and trace-preserving (CPTP) map, further describing thermal relaxation processes. In this p
Externí odkaz:
http://arxiv.org/abs/2406.10477
Autor:
Koide, T., Nicacio, F.
Publikováno v:
Phys. Lett. A 494, 129277 (2024)
We introduce a generalized classical model of Brownian motion for describing thermal relaxation processes which is thermodynamically consistent. Applying the canonical quantization to this model, a quantum equation for the density operator is obtaine
Externí odkaz:
http://arxiv.org/abs/2310.17061
Autor:
Koide, T., Kodama, T.
We formulate thermodynamical relations based on the field degrees of freedom by introducing a work induced by the volume change in the function space, in addition to the usual work associated with the spatial volume change. The first and second laws
Externí odkaz:
http://arxiv.org/abs/2303.01588
Autor:
Koide, T., Kodama, T.
We propose new ideal hydrodynamics in the function space which describes a fluid composed of the 1+1 dimensional real scalar field in the framework of the stochastic variational method (SVM). In the derivation, the thermal equilibrium is assumed to t
Externí odkaz:
http://arxiv.org/abs/2303.01587
In the stochastic formulation of viscous hydrodynamics, the velocity of a fluid element fluctuates satisfying a similar relation to the quantum-mechanical uncertainty relation. Using a non-relativistic toy model, we show that the presence of such a v
Externí odkaz:
http://arxiv.org/abs/2208.00452
Autor:
Verma, V. K., Sakamoto, S., Ishikawa, K., Singh, V. R., Ishigami, K., Shibata, G., Kadono, T., Koide, T., Kuroda, S., Fujimori, A.
The prototypical diluted magnetic semiconductor Cd1-xMnxTe is a spin glass (x<0.6) or an antiferromagnet (x>0.6), but becomes ferromagnetic upon doping with a small amount of Cr atoms substituting for Mn. In order to investigate the origin of the fer
Externí odkaz:
http://arxiv.org/abs/2204.02042
Autor:
Koide, T.
The systematic expansion method of the solution of the Fokker-Planck equation is developed by generalizing the formulation proposed in [J. Phys. A50, 325001 (2017)]. Using this method, we obtain a new formula to calculate the mean work perturbatively
Externí odkaz:
http://arxiv.org/abs/2201.03693
Autor:
Suzuki, M., Gao, B., Shibata, G., Sakamoto, S., Nonaka, Y., Ikeda, K., Chi, Z., Wan, Y. -X., Takeda, T., Takeda, Y., Koide, T., Tanaka, A., Kobayashi, M., Cheong, S. -W., Fujimori, A.
Publikováno v:
Phys. Rev. Research 4, 013139 (2022)
The van der Waals ferromagnet Cr$_2$Ge$_2$Te$_6$ (CGT) has a two-dimensional crystal structure where each layer is stacked through van der Waals force. We have investigated the nature of the ferromagnetism and the weak perpendicular magnetic anisotro
Externí odkaz:
http://arxiv.org/abs/2109.05715
Autor:
Koide, T.
A minimum uncertainty state for position and momentum of a fluid element is obtained. We consider a general fluid described by the Navier-Stokes-Korteweg (NSK) equation, which reproduces the behaviors of a standard viscous fluid, a fluid with the cap
Externí odkaz:
http://arxiv.org/abs/2104.11777