Zobrazeno 1 - 10
of 78
pro vyhledávání: '"Ballagh, R. J."'
Autor:
Fersterer, Petra, Ballagh, R. J.
Publikováno v:
Phys. Rev. A 101, 013431 (2020)
Analytic solutions for steady-state expectation values of atomic quantities and second order correlations are obtained for a fully quantum treatment of two stationary dipole-coupled atoms driven in a standard geometric configuration by a near resonan
Externí odkaz:
http://arxiv.org/abs/1905.01812
Autor:
Sykes, A. G., Ballagh, R. J.
We present a theoretical treatment of coherent light scattering from an interacting 1D Bose gas at finite temperatures. We show how this can provide a nondestructive measurement of the atomic system states. The equilibrium states are determined by th
Externí odkaz:
http://arxiv.org/abs/1109.3727
We present a theoretical model for Bragg scattering from a Bose-Einstein condensate (BEC) in the vicinity of a magnetic Feshbach resonance, using a two c-field formalism, one c-field for the atom and the other for a molecule formed of two atoms. We u
Externí odkaz:
http://arxiv.org/abs/1109.2977
Publikováno v:
Phys. Rev. A 82, 013621 (2010)
The coherence properties of degenerate Bose gases have usually been expressed in terms of spatial correlation functions, neglecting the rich information encoded in their temporal behavior. In this paper we show, using a Hamiltonian classical-field fo
Externí odkaz:
http://arxiv.org/abs/0912.5022
Publikováno v:
Phys. Rev. A 81, 013610 (2010)
We perform finite-temperature dynamical simulations of the arrest of a rotating Bose-Einstein condensate by a fixed trap anisotropy, using a Hamiltonian classical-field method. We consider a quasi-two-dimensional condensate containing a single vortex
Externí odkaz:
http://arxiv.org/abs/0909.1683
Publikováno v:
Phys. Rev. A 80, 053624 (2009)
We consider a finite-temperature Bose-Einstein condensate in a quasi-two-dimensional trap containing a single precessing vortex. We find that such a configuration arises naturally as an ergodic equilibrium of the projected Gross-Pitaevskii equation,
Externí odkaz:
http://arxiv.org/abs/0908.2551
Publikováno v:
Advances in Physics, 57, 363 (2008)
We review phase space techniques based on the Wigner representation that provide an approximate description of dilute ultra-cold Bose gases. In this approach the quantum field evolution can be represented using equations of motion of a similar form t
Externí odkaz:
http://arxiv.org/abs/0809.1487
Publikováno v:
Phys. Rev. A 78, 063601 (2008)
We present a quantum mechanical treatment of the mechanical stirring of Bose-Einstein condensates using classical field techniques. In our approach the condensate and excited modes are described using a Hamiltonian classical field method in which the
Externí odkaz:
http://arxiv.org/abs/0808.3552
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
Publikováno v:
Phys. Rev. A 73, 043618 (2006)
We apply the truncated Wigner method to the process of three-body recombination in ultracold Bose gases. We find that within the validity regime of the Wigner truncation for two-body scattering, three-body recombination can be treated using a set of
Externí odkaz:
http://arxiv.org/abs/cond-mat/0602062