TY - JOUR
T1 - Beliaev Damping of Quasiparticles in a Bose-Einstein Condensate
AU - Katz, N.
AU - Steinhauer, J.
AU - Ozeri, R.
AU - Davidson, N.
PY - 2002
Y1 - 2002
N2 - 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.
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.
UR - http://www.scopus.com/inward/record.url?scp=0037175950&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.89.220401
DO - 10.1103/PhysRevLett.89.220401
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AN - SCOPUS:0037175950
SN - 0031-9007
VL - 89
JO - Physical Review Letters
JF - Physical Review Letters
IS - 22
ER -