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Open Quantum Systems Decoherence Quantum Simulation

Field-theoretical study of the Bose polaron

arXiv
Authors: Steffen Patrick Rath, Richard Schmidt

Year

2013

Paper ID

33200

Status

Preprint

Abstract Read

~2 min

Abstract Words

103

Citations

N/A

Abstract

We study the properties of the Bose polaron, an impurity strongly interacting with a Bose-Einstein condensate, using a field-theoretic approach and make predictions for the spectral function and various quasiparticle properties that can be tested in experiment. We find that most of the spectral weight is contained in a coherent attractive and a metastable repulsive polaron branch. We show that the qualitative behavior of the Bose polaron is well described by a non-selfconsistent T-matrix approximation by comparing analytical results to numerical data obtained from a fully selfconsistent T-matrix approach. The latter takes into account an infinite number of bosons excited from the condensate.

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  • We study the properties of the Bose polaron, an impurity strongly interacting with a Bose-Einstein condensate, using a field-theoretic approach and make predictions for the...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1308.3457 [2] arXiv https://arxiv.org/abs/1308.3457 [3] Publisher https://arxiv.org/abs/1308.3457

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