Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Masaya Kunimi"'
Publikováno v:
Physical Review Research, Vol 3, Iss 1, p 013060 (2021)
The discrete truncated Wigner approximation (DTWA) is a powerful tool for analyzing dynamics of quantum spin systems. Since the DTWA includes the leading-order quantum corrections to a mean-field approximation, it is naturally expected that the DTWA
Externí odkaz:
https://doaj.org/article/18d8747dbf8b47858580db134207edad
Publikováno v:
New Journal of Physics, Vol 20, Iss 1, p 019501 (2018)
Externí odkaz:
https://doaj.org/article/7489e63e0aab4f1c859a7e45890496d0
Publikováno v:
New Journal of Physics, Vol 18, Iss 7, p 073029 (2016)
We have observed and characterized the nonequilibrium spatial dynamics of a two-component ^87 Rb Bose–Einstein condensate (BEC) that is controllable switched back and forth between the miscible and immiscible phases of the phase separation transiti
Externí odkaz:
https://doaj.org/article/e064d7c4c21543f0bf758fe4ef670969
Publikováno v:
Physical Review Research. 3
The discrete truncated Wigner approximation (DTWA) is a powerful tool for analyzing dynamics of quantum spin systems. Since the DTWA includes the leading-order quantum corrections to a mean-field approximation, it is naturally expected that the DTWA
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8cc1f8114234f9969d8a61a0e9fbed05
https://doi.org/10.1103/physrevresearch.3.013060
https://doi.org/10.1103/physrevresearch.3.013060
Autor:
Ippei Danshita, Masaya Kunimi
We investigate nonergodic behavior of the one-dimensional Bose-Hubbard model, which emerges in the unitary quantum dynamics starting with initial-state $|\psi(0)\rangle=|\cdots 2020\cdots \rangle$ in the presence of a trapping potential. We compute t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ad138f1b610c44ba8292810cae2528d3
Autor:
Ippei Danshita, Masaya Kunimi
Publikováno v:
Physical Review A. 100
We investigate stability of non-equilibrium steady states of Bose-Einstein condensates with a local one-body loss in the presence of double potential barriers. We construct an exactly solvable mean-field model, in which the local loss and the potenti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::757b97cfbb2549c022e8e627cb5393ef
https://doi.org/10.1103/physreva.100.063617
https://doi.org/10.1103/physreva.100.063617
We analyze the time evolution of the Bose-Hubbard model after a sudden quantum quench to a weakly interacting regime. Specifically, motivated by a recent experiment at Kyoto University, we numerically simulate redistribution of the kinetic and onsite
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::724c7d8a4114cf9c270c6170d0d26488
http://arxiv.org/abs/1810.04347
http://arxiv.org/abs/1810.04347
Autor:
Masaya Kunimi, Ippei Danshita
We study the supercurrent decay of a Bose-Einstein condensate in a ring trap combined with a repulsive barrier potential. In recent experiments, Kumar {\it et al.} [Phys. Rev. A {\bf 95}, 021602(R) (2017)] have measured the dependence of the decay ra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8aadc686773e37364f84a958965b60da
http://arxiv.org/abs/1712.09493
http://arxiv.org/abs/1712.09493
Autor:
Takuya Hirano, Ryotaro Okada, Masahiro Takahashi, Yujiro Eto, Keita Nabeta, Masaya Kunimi, Hiroki Saito
Publikováno v:
Physical Review A. 96
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::287201d9dd50787d3e511dd161455c82
https://doi.org/10.1103/physreva.96.069904
https://doi.org/10.1103/physreva.96.069904
Autor:
Masaya Kunimi, Ippei Danshita
We study the decay of superflow via thermally activated phase slips in one-dimensional Bose gases in a shallow optical lattice. By using the Kramers formula, we numerically calculate the nucleation rate of a thermally activated phase slip for various
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7952240085db95d32589cd6d268cba03