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Microscopic Theory of Drag in a Bose Condensate Interacting with a Moving Reservoir
Abstract
We derive a microscopic theory of drag for a Bose-Einstein condensate interacting with a moving reservoir. Starting from interactions between a condensate and a drifting fermionic bath, we integrate out the bath degrees of freedom within the Born--Markov approximation to obtain an effective Gross--Pitaevskii equation with a drag potential. From this potential we derive an effective drag force and obtain a closed expression for the drag coefficient, determined by the reservoir density fluctuations and the condensate density profile. As an application, we simulate the drag for an exciton--polariton condensate interacting with a drifting electron gas.
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BibTeX
@misc{alnatah2026microscopic,
title = {{Microscopic Theory of Drag in a Bose Condensate Interacting with a Moving Reservoir}},
author = {Hassan Alnatah and Shuang Liang and Shouvik Mukherjee and Qi Yao and Ashton S. Bradley and David W. Snoke},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2608.27898},
eprint = {2608.27898},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.27898},
}
RIS
TY - UNPB
TI - Microscopic Theory of Drag in a Bose Condensate Interacting with a Moving Reservoir
AU - Hassan Alnatah
AU - Shuang Liang
AU - Shouvik Mukherjee
AU - Qi Yao
AU - Ashton S. Bradley
AU - David W. Snoke
PY - 2026
DA - 2026/10/14
PB - arXiv
DO - 10.48550/arxiv.2608.27898
UR - https://arxiv.org/abs/2608.27898
AB - We derive a microscopic theory of drag for a Bose-Einstein condensate interacting with a moving reservoir. Starting from interactions between a condensate and a drifting fermionic bath, we integrate out the bath degrees of freedom within the Born--Markov approximation to obtain an effective Gross--Pitaevskii equation with a drag potential. From this potential we derive an effective drag force and obtain a closed expression for the drag coefficient, determined by the reservoir density fluctuations and the condensate density profile. As an application, we simulate the drag for an exciton--polariton condensate interacting with a drifting electron gas.
ER -