Dynamic structure factor of a Bose-Einstein condensate in a one-dimensional optical lattice

Journal Article · Thu May 01 00:00:00 EDT 2003 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.67.053609· OSTI ID:20636405

Menotti, C ^[1]; Kraemer, M; Stringari, S ^[1]; Pitaevskii, L ^[1]

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1. Dipartimento di Fisica, Universita di Trento and BEC-INFM, I-38050 Povo (Italy)

We study the effect of a one-dimensional periodic potential on the dynamic structure factor of an interacting Bose-Einstein condensate at zero temperature. We show that, due to phononic correlations, the excitation strength toward the first band develops a typical oscillating behavior as a function of the momentum transfer, and vanishes at even multiples of the Bragg momentum. The effects of interactions on the static structure factor are found to be significantly amplified by the presence of the optical potential. Our predictions can be tested in stimulated photon scattering experiments.

• OSTI ID: 20636405
• Journal Information: Physical Review. A, Vol. 67, Issue 5; Other Information: DOI: 10.1103/PhysRevA.67.053609; (c) 2003 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BOSE-EINSTEIN CONDENSATION
CORRELATIONS
EXCITATION
LATTICE FIELD THEORY
MOMENTUM TRANSFER
ONE-DIMENSIONAL CALCULATIONS
OSCILLATIONS
PERIODICITY
PHOTONS
POTENTIALS
SCATTERING
STRUCTURE FACTORS