Generating macroscopic-quantum-superposition states in momentum and internal-state space from Bose-Einstein condensates with repulsive interactions

Journal Article · Sat May 01 04:00:00 EDT 2004 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.69.053605· OSTI ID:20643650

Higbie, J; Stamper-Kurn, D M ^[1]

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1. Department of Physics, University of California, Berkeley, California 94720 (United States)

Resonant Raman coupling between internal levels can create double-well momentum-space potentials for multilevel 'periodically-dressed' atoms. We develop a many-body formalism for a weakly interacting, trapped periodically dressed Bose gas which illustrates how a tunable exchange interaction yields correlated many-body ground states. In contrast to the case of a position-space double well, the ground state of stable periodically-dressed Bose gases with repulsive interactions tends toward a macroscopic superposition state in the regime where interactions dominate the momentum-space tunneling induced by the external trapping potential. We discuss how real-time control of experimental parameters can be used to create macroscopic quantum superpositions of either momentum or internal states, and how these states could be dynamically controlled, opening the way toward highly sensitive interferometry and frequency metrology.

• OSTI ID: 20643650
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 69; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
BOSE-EINSTEIN CONDENSATION
BOSE-EINSTEIN GAS
CONTROL
COUPLING
EXCHANGE INTERACTIONS
GROUND STATES
INTERFEROMETRY
LASER RADIATION
MANY-BODY PROBLEM
PERIODICITY
POTENTIALS
RADIATION PRESSURE
RAMAN SPECTRA
SPACE
TRAPPING
TUNNEL EFFECT