Zobrazeno 1 - 10
of 87
pro vyhledávání: '"Gentaro Watanabe"'
Publikováno v:
Communications Physics, Vol 7, Iss 1, Pp 1-10 (2024)
Abstract The phase distribution in a Bose-Einstein condensate can realize various topological states classified by distinct winding numbers. While states with different winding numbers are topologically protected in the linear Schrödinger equation,
Externí odkaz:
https://doaj.org/article/7521a7b5471245c99e5f6edd83323113
Autor:
Guo-Hua Xu, Gentaro Watanabe
Publikováno v:
Physical Review Research, Vol 4, Iss 3, p L032017 (2022)
For cyclic heat engines operating in a finite cycle period, thermodynamic quantities have intercycle and intracycle correlations. By tuning the driving protocol appropriately, we can get the negative intercycle correlation to reduce the fluctuation o
Externí odkaz:
https://doaj.org/article/0be57411a4474668b3f0c4b7f7a4a172
Autor:
Gentaro Watanabe, Yuki Minami
Publikováno v:
Physical Review Research, Vol 4, Iss 1, p L012008 (2022)
Fluctuations of thermodynamic quantities become non-negligible and play an important role when the system size is small. We develop finite-time thermodynamics of fluctuations in microscopic heat engines whose environmental temperature and mechanical
Externí odkaz:
https://doaj.org/article/175a7e30ade74ac9a8903d4ca0aebcfa
Publikováno v:
Physical Review Research, Vol 4, Iss 4, p 043139 (2022)
We study the ratio between the variances of work output and heat input, η^{(2)}, for a class of four-stroke heat engines, which covers various typical cycles. Recent studies on the upper and lower bounds of η^{(2)} are based on the quasistatic limi
Externí odkaz:
https://doaj.org/article/db5a7effeb074f3c9607a9b7428ef69c
Autor:
Yuki Minami, Gentaro Watanabe
Publikováno v:
Physical Review Research, Vol 4, Iss 3, p 033141 (2022)
Calculations of the superfluid density in the inner crust of neutron stars using different approaches are in strong disagreement, which causes a debate on the accountability of pulsar glitches based on superfluidity. Using a simple unified model, we
Externí odkaz:
https://doaj.org/article/07d1811d086f427797857b250eaa51e0
Publikováno v:
Entropy, Vol 18, Iss 4, p 118 (2016)
The system of a cold atomic gas in an optical lattice is governed by two factors: nonlinearity originating from the interparticle interaction, and the periodicity of the system set by the lattice. The high level of controllability associated with suc
Externí odkaz:
https://doaj.org/article/ef69bd853ecb4892bc7141a70334b3c6
Publikováno v:
New Journal of Physics, Vol 18, Iss 2, p 023011 (2016)
We study multiple period states of a two-component unpolarized superfluid Fermi gas in an optical lattice along the Bardeen–Cooper–Schrieffer (BCS) to Bose–Einstein condensate (BEC) crossover. The existence of states whose period is a multiple
Externí odkaz:
https://doaj.org/article/084be70d93934b6b975a9573e2db3de8
Publikováno v:
New Journal of Physics, Vol 17, Iss 7, p 075018 (2015)
Work in the paradigm of the quantum fluctuation theorems of Crooks and Jarzynski is determined by projective measurements of energy at the beginning and end of the force protocol. In analogy to classical systems, we consider an alternative definition
Externí odkaz:
https://doaj.org/article/4f654de6ce2a4728ac2da834244b74b3
Publikováno v:
New Journal of Physics, Vol 16, Iss 1, p 015032 (2014)
The transient quantum fluctuation theorems of Crooks and Jarzynski restrict and relate the statistics of work performed in forward and backward forcing protocols. So far, these theorems have been obtained under the assumption that the work is determi
Externí odkaz:
https://doaj.org/article/fca0745672ea4925970c9a8423253600
Autor:
Gentaro Watanabe, Yuki Minami
Publikováno v:
Physical Review Research. 4
Calculations of the superfluid density in the inner crust of neutron stars by different approaches are in strong disagreement, which causes a debate on the accountability of pulsar glitches based on superfluidity. Taking a simple unified model, we st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6578d62663ed30682aaf88fdf59c83ed
https://doi.org/10.1103/physrevresearch.4.033141
https://doi.org/10.1103/physrevresearch.4.033141