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cond-mat.quant-gas2023★ 4 cited
Phonon damping in a 2D superfluid: insufficiency of Fermi's golden rule at low temperature
Yvan Castin, Alan Serafin, Alice Sinatra
It is generally accepted that the phonon gas of a superfluid always enters a weak coupling regime at sufficiently low temperatures, whatever the strength of the interactions betwee…
cond-mat.quant-gas2018★ 3 cited
Coherence time of a Bose-Einstein condensate in an isolated harmonically trapped gas
Yvan Castin, Alice Sinatra
We study the condensate phase dynamics in a low-temperature equilibrium gas of weakly interacting bosons, harmonically trapped and isolated from the environment. We find that at lo…