Zobrazeno 1 - 10
of 320
pro vyhledávání: '"A. D. F. Walls"'
Publikováno v:
Journal of Optics B: Quantum and Semiclassical Optics. 1:490-495
We propose a scheme to generate a large Kerr nonlinearity based on electromagnetically induced transparency in a single atom placed in a high-finesse microcavity. We perform a thorough analysis of the system dynamics using a dressed states approach.
Autor:
D. F. Walls, Janne Ruostekoski
Publikováno v:
Physical Review A. 59:R2571-R2574
We propose a method of measuring diffusion of the relative phase between two Bose-Einstein condensates occupying different nuclear or electronic spin hyperfine states coupled by a two-photon magnetic-dipole transition via an intermediate level. Due t
Publikováno v:
Physical Review A. 59:2306-2321
We present a formulation of non-Markovian quantum trajectories for open systems from a measurement theory perspective. In our treatment there are three distinct ways in which non-Markovian behavior can arise; a mode dependent coupling between bath (r
Autor:
Michael J. Steel, L. I. Plimak, M. K. Olsen, D. F. Walls, Matthew Collett, S. M. Tan, Robert Graham, Peter D. Drummond
Publikováno v:
Physical Review A. 58:4824-4835
We introduce the study of dynamical quantum noise in Bose-Einstein condensates through numerical simulation of stochastic partial differential equations obtained using phase-space representations. We derive evolution equations for a single trapped co
Autor:
D. F. Walls, A. S. Parkins
Publikováno v:
Physics Reports. 303:1-80
The experimental realisation of Bose–Einstein condensates of dilute atomic vapours has generated immense interest and activity in this field. Here, we present a review of recent theoretical research into the properties of trapped dilute-gas Bose–
Publikováno v:
Physical Review A. 58:1765-1774
Publikováno v:
Scopus-Elsevier
The quantum state of a single symmetry-broken condensate at zero temperature is calculated using perturbative techniques. For a fixed mean number of atoms, the state is found to closely approximate a number squeezed state. We propose a means of exper
Autor:
Janne Ruostekoski, D. F. Walls
Publikováno v:
Physical Review A. 58:R50-R53
We study the dynamics of a Bose-Einstein condensate in a double-well potential in the two-mode approximation. The dissipation of energy from the condensate is described by the coupling to a thermal reservoir of non-condensate modes. As a consequence
Publikováno v:
Physical Review A. 57:4686-4694
Publikováno v:
Physical Review A. 57:3805-3808
We propose an optical method for increasing the number of atoms in a pair of dilute gas Bose-Einstein condensates. The method uses laser-driven Raman transitions which scatter atoms between the condensate and non-condensate atom fractions. For a rang