Schumm Group
TU Wien   Quantum-enhanced measurement and metrology
Quantum-enhanced measurement and metrology - Schumm Group
Quantum-enhanced measurement and metrology – Schumm Group

Parametric-squeezing amplification of Bose-Einstein condensates

Author(s): G. Jäger, T. Berrada, J. Schmiedmayer, Thorsten Schumm, U. Hohenester

Journal: Phys. Rev. A

Volume: 92

Page(s): 053632

Year: 2015

DOI Number: DOI: 10.1103/PhysRevA.92.053632

Link: Link to publication

Abstract:

We theoretically investigate the creation of squeezed states of a Bose-Einstein condensate (BEC) trapped in a magnetic double-well potential. The number or phase squeezed states are created by modulating the tunnel coupling between the two wells periodically with twice the Josephson frequency, i.e., through parametric amplification. Simulations are performed with the multiconfigurational ime-dependent Hartree method for bosons. We employ optimal control theory to bring the condensate to a complete halt at a final time, thus creating a highly queezed state (squeezing factor of 0.12, ξ 2 S =− 18 dB) suitable for atom interferometry.

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