Zobrazeno 1 - 10
of 235
pro vyhledávání: '"Nakamura, Katsuhiro"'
Autor:
Masuda, Shumpei, Nakamura, Katsuhiro
Speed is the key to further advances in technology. For example, quantum technologies, such as quantum computing, require fast manipulations of quantum systems in order to overcome the effect of decoherence. However, controlling the speed of quantum
Externí odkaz:
http://arxiv.org/abs/2207.12739
Publikováno v:
Phys. Rev. E 102, 012129 (2020)
The fast-forward (FF) scheme proposed by Masuda and Nakamura (\textit{Proc. R. Soc. A} \textbf{466}, 1135 (2010)) in the context of conservative quantum dynamics can reproduce a quasi-static dynamics in an arbitrarily short time. We apply the FF sche
Externí odkaz:
http://arxiv.org/abs/2003.05099
Publikováno v:
Physical Review A 2019
The fast forward scheme of adiabatic quantum dynamics is applied to finite regular spin clusters with various geometries and the nature of driving interactions is elucidated. The fast forward is the quasi-adiabatic dynamics guaranteed by regularizati
Externí odkaz:
http://arxiv.org/abs/1906.04433
Publikováno v:
Phys. Rev. E 97, 042104 (2018)
With use of the scheme of fast forward which realizes quasi-static or adiabatic dynamics in shortened time scale, we investigate a thermally-isolated ideal quantum gas confined in a rapidly dilating one-dimensional (1D) cavity with the time-dependent
Externí odkaz:
http://arxiv.org/abs/1804.02258
Publikováno v:
Physical Review A 96, 052106 (2017)
We develop a scheme of fast forward of adiabatic spin dynamics of quantum entangled states. We settle the quasi-adiabatic dynamics by adding the regularization terms to the original Hamiltonian and then accelerate it with use of a large time-scaling
Externí odkaz:
http://arxiv.org/abs/1711.04074
Publikováno v:
Phys. Rev. {\bf A 95}, 062108 (2017)
By developing the preceding work on the fast forward of transient phenomena of quantum tunneling by Khujakulov and Nakamura (Phys. Rev. {\bf A 93}, 022101 (2016) ), we propose a scheme of the exact fast forward of adiabatic control of stationary tunn
Externí odkaz:
http://arxiv.org/abs/1706.03966
Autor:
Nakamura, Katsuhiro, Babajanov, Doniyor, Matrasulov, Davron, Kobayashi, Michikazu, Muruganandam, Paulsamy
Publikováno v:
J. Phys. A: Math. Theor. 49 (2016) 315102
With use of a variational principle, we investigate a role of breathing width degree of freedom in the effective theory of interacting vortices in a trapped single-component Bose-Einstein condensates in 2 dimensions under the strong repulsive cubic n
Externí odkaz:
http://arxiv.org/abs/1607.00201
Autor:
Khujakulov, Anvar, Nakamura, Katsuhiro
Publikováno v:
Phys. Rev. A 93, 022101 (2016)
We propose a scheme of the exact fast-forwarding of standard quantum dynamics for a charged particle. The present idea allows the acceleration of both the amplitude and phase of the wave function throughout the fast-forward time range and is distinct
Externí odkaz:
http://arxiv.org/abs/1602.06432
Publikováno v:
EPL, 115, 50002 (2016)
We consider the sine-Gordon equation on metric graphs with simple topologies and derive vertex boundary conditions from the fundamental conservation laws, such as energy and current conservation. Traveling wave solutions for star and tree graphs are
Externí odkaz:
http://arxiv.org/abs/1511.02314
Publikováno v:
Phys. Rev. Lett. 113, 063003 (2014)
A protocol is proposed for the rapid coherent loading of a Bose-Einstein condensate into the ground state of an optical lattice, without residual excitation associated with the breakdown of adiabaticity. The driving potential required to assist the r
Externí odkaz:
http://arxiv.org/abs/1407.3212