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Quantum acoustic bremsstrahlung of impurity atoms in a Bose--Einstein condensate

I. E. Mazets
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Abstract

We study the process of scattering of two impurity atoms accompanied by generation of an elementary excitation in a surrounding Bose--Einstein condensate. This process, unlike the phonon generation by a {\it single} impurity atom, has no velocity threshold and can be regarded as a quantum acoustic analog of a bremsstrahlung in quantum electrodynamics.

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I. E. Mazets. 2002-05-11. Quantum acoustic bremsstrahlung of impurity atoms in a Bose--Einstein condensate. https://arxiv.org/abs/cond-mat/0205235

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