Noise correlations in the expansion of an interacting one-dimensional Bose gas from a regular array

Journal Article · Sat Oct 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.84.043632· OSTI ID:22095423

Lamacraft, Austen ^[1]

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1. Department of Physics, University of Virginia, Charlottesville, Virginia 22904-4714 (United States)

We consider the one-dimensional expansion of a system of interacting bosons, starting from a regular array. Without interactions the familiar Hanbury Brown and Twiss effect for bosons gives rise to a series of peaks in the density-density correlations of the expanded system. Infinitely repulsive particles likewise give a series of dips, a signature of the underlying description in terms of free fermions. In the intermediate case of finite interaction, the noise correlations consist of a set of Fano resonance lineshapes, with an asymmetry parameter determined by the scattering phase shift of a pair of particles and a width depending on the initial momentum spread of the particles.

• OSTI ID: 22095423
• Journal Information: Physical Review. A, Vol. 84, Issue 4; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BOSE-EINSTEIN GAS
BOSONS
CORRELATIONS
DENSITY
FERMIONS
INTERACTING BOSON MODEL
INTERACTIONS
ONE-DIMENSIONAL CALCULATIONS
PARTICLES
PHASE SHIFT
RESONANCE