Beliaev Damping of Quasiparticles in a Bose-Einstein Condensate

N. Katz; J. Steinhauer; R. Ozeri; N. Davidson

doi:10.1103/PhysRevLett.89.220401

Beliaev Damping of Quasiparticles in a Bose-Einstein Condensate

N. Katz
, J. Steinhauer
, R. Ozeri
, N. Davidson

Research output: Contribution to journal › Article › peer-review

80 Scopus citations

Abstract

We report a measurement of the suppression of collisions of quasiparticles with ground state atoms within a Bose-Einstein condensate at low momentum. These collisions correspond to Beliaev damping of the excitations, in the previously unexplored regime of the continuous quasiparticle energy spectrum. We use a hydrodynamic simulation of the expansion dynamics, with the Beliaev damping cross section, in order to confirm the assumptions of our analysis.

Original language	English
Journal	Physical Review Letters
Volume	89
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevLett.89.220401
State	Published - 2002
Externally published	Yes

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10.1103/PhysRevLett.89.220401

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abstract = "We report a measurement of the suppression of collisions of quasiparticles with ground state atoms within a Bose-Einstein condensate at low momentum. These collisions correspond to Beliaev damping of the excitations, in the previously unexplored regime of the continuous quasiparticle energy spectrum. We use a hydrodynamic simulation of the expansion dynamics, with the Beliaev damping cross section, in order to confirm the assumptions of our analysis.",

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AB - We report a measurement of the suppression of collisions of quasiparticles with ground state atoms within a Bose-Einstein condensate at low momentum. These collisions correspond to Beliaev damping of the excitations, in the previously unexplored regime of the continuous quasiparticle energy spectrum. We use a hydrodynamic simulation of the expansion dynamics, with the Beliaev damping cross section, in order to confirm the assumptions of our analysis.

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Beliaev Damping of Quasiparticles in a Bose-Einstein Condensate

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