Work

Parametric-squeezing amplification of Bose-Einstein condensates

Year: 2015

Type: article

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 time-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 squeezed state (squeezing factor of 0.12, ${\ensuremath{\xi}}_{S}^{2}=\ensuremath{-}18$ dB) suitable for atom interferometry.

Source: Physical Review A

DOI: 10.1103/physreva.92.053632

Authors: Georg Jäger, Tarik Berrada, Jörg Schmiedmayer, Thorsten Schumm, Ulrich Hohenester

Institutions: University of Graz, TU Wien, Vienna Center for Quantum Science and Technology

Language: English

Topic: Cold Atom Physics and Bose-Einstein Condensates

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Austrian Science Fund

Award: Optimal quantum control of Bose-Einstein condensates