Characterisation of the dynamical quantum state of a zero temperature Bose-Einstein condensate
arXiv:cond-mat/0302066 · doi:10.1016/S0375-9601(02)00732-6
Abstract
We describe the quantum state of a Bose-Einstein condensate at zero temperature. By evaluating the Q-function we show that the ground state of Bose-Einstein condensate under the Hartree approximation is squeezed. We find that multimode Schroedinger cat states are generated as the condensate evolves in a ballistic expansion.
13 pages, 6 figures
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- Numerical representation of quantum states in the positive-P and Wigner representations
- Quantum squeezing and entanglement in a two-mode Bose-Einstein condensate with time-dependent Josephson-like coupling
- Generalized coherent state representation of Bose-Einstein condensates
- Entanglement in the Bogoliubov vacuum
- Squeezing in the weakly interacting uniform Bose condensate