Quantum-field dynamics of expanding and contracting Bose-Einstein condensates

Details Quantum-field dynamics of expanding and contracting Bose-Einstein condensates Quantum-field dynamics of expanding and contracting Bose-Einstein condensates

2007-09-10

arxiv.org/abs/0709.1362v1

Phys. Rev. A 77, 023619 (2008)

Physics

Condensed Matter

Other Condensed Matter

9 pages, 4 figures

Scientific paper

10.1103/PhysRevA.77.023619

We analyze the dynamics of quantum statistics in a harmonically trapped Bose-Einstein condensate, whose two-body interaction strength is controlled via a Feshbach resonance. From an initially non-interacting coherent state, the quantum field undergoes Kerr squeezing, which can be qualitatively described with a single mode model. To render the effect experimentally accessible, we propose a homodyne scheme, based on two hyperfine components, which converts the quadrature squeezing into number squeezing. The scheme is numerically demonstrated using a two-component Hartree-Fock-Bogoliubov formalism.

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