Characterisation of the dynamical quantum state of a zero temperature Bose-Einstein condensate
J. Rogel-Salazar, S. Choi, G.H.C. New, K. Burnett
TL;DR
This paper characterizes the quantum state of a zero-temperature Bose-Einstein condensate, revealing it is squeezed and can generate multimode Schrödinger cat states during ballistic expansion.
Contribution
It provides a detailed analysis of the quantum state of a BEC at zero temperature, highlighting the presence of squeezing and cat states during evolution.
Findings
Ground state of BEC is squeezed.
Multimode Schrödinger cat states are generated during expansion.
Quantum state characterized via the Q-function.
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.
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