Zobrazeno 1 - 10
of 160
pro vyhledávání: '"Challis K"'
Autor:
Challis, K. J., Jack, M. W.
Publikováno v:
Phys. Rev. E 88, 062136 (2013)
We present a theoretical investigation of thermal fluctuation statistics in a molecular motor. Energy transfer in the motor is described using a multidimensional discrete master equation with nearest-neighbor hopping. In this theory, energy transfer
Externí odkaz:
http://arxiv.org/abs/1308.6354
Autor:
Challis, K. J., Jack, Michael W.
Publikováno v:
Phys. Rev. E 97, 062158 (2018)
We present a theoretical treatment of overdamped Brownian motion on a multidimensional tilted periodic potential that is analogous to the tight-binding model of quantum mechanics. In our approach we expand the continuous Smoluchowski equation in the
Externí odkaz:
http://arxiv.org/abs/1301.1369
Autor:
Challis, K. J., Jack, Michael W.
Publikováno v:
Phys. Rev. E 88, 042114 (2013)
We present a theoretical treatment of energy transfer in a molecular motor described in terms of overdamped Brownian motion on a multidimensional tilted periodic potential. The tilt acts as a thermodynamic force driving the system out of equilibrium
Externí odkaz:
http://arxiv.org/abs/1208.5818
Publikováno v:
Phys. Rev. A 79, 052701 (2009)
We consider elastic single-particle scattering from a one-dimensional two-component trapped superfluid Fermi gas when the incoming projectile particle is identical to one of the confined species. Our theoretical treatment is based on the Hartree-Fock
Externí odkaz:
http://arxiv.org/abs/0811.4284
Publikováno v:
Phys. Rev. A 78, 063401 (2008)
We consider the atom-optical delta-kicked accelerator when the initial momentum distribution is symmetric. We demonstrate the existence of quantum-resonant dynamics, and derive analytic expressions for the system evolution. In particular, we consider
Externí odkaz:
http://arxiv.org/abs/0807.2587
Publikováno v:
Phys. Rev. A 79, 023423 (2009)
We consider resonant dynamics in a dilute atomic gas falling under gravity through a periodically pulsed standing-wave laser field. Our numerical calculations are based on a Monte Carlo method for an incoherent mixture of noninteracting plane waves,
Externí odkaz:
http://arxiv.org/abs/0806.3894
The manifestation of quantum resonances and antiresonances in a finite temperature dilute atomic gas
Publikováno v:
Phys. Rev. A 76, 043415 (2007)
We investigate the effect of temperature on resonant and antiresonant dynamics in a dilute atomic gas kicked periodically by a standing wave laser field. Our numerical calculations are based on a Monte Carlo method for an incoherent mixture of non-in
Externí odkaz:
http://arxiv.org/abs/0707.1006
Publikováno v:
Phys. Rev. Lett. 98, 093002 (2007)
We present a theoretical treatment of Bragg scattering of a degenerate Fermi gas in the weakly interacting BCS regime. Our numerical calculations predict correlated scattering of Cooper pairs into a spherical shell in momentum space. The scattered sh
Externí odkaz:
http://arxiv.org/abs/cond-mat/0604330
Autor:
Challis, K J, Ballagh, R J
Publikováno v:
Phys. Rev. A 71, 033620 (2005)
We present a theoretical treatment of Bragg spectroscopy of an accelerating condensate in a solitary-wave state. Our treatment is based on the Gross-Pitaevskii equation with an optical potential representing the Bragg pulse and an additional external
Externí odkaz:
http://arxiv.org/abs/cond-mat/0410168
Publikováno v:
Phys. Rev. A., 70, 2004, 041602(R)
We experimentally investigate the atom-optical delta-kicked harmonic oscillator for the case of nonlinearity due to collisional interactions present in a Bose-Einstein condensate. A Bose condensate of rubidium atoms tightly confined in a static harmo
Externí odkaz:
http://arxiv.org/abs/cond-mat/0406545