Work

Microscopic theory of drag in a Bose condensate interacting with a moving reservoir

Year: 2026

Type: article

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.

Source: Physical review. B./Physical review. B

DOI: 10.1103/lhzw-fyss

Authors: Hassan Alnatah, Shuang Liang, Shouvik Mukherjee, Qi Yao, Ashton S. Bradley, David W. Snoke

Language: English

Topic: Strong Light-Matter Interactions

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, University of Pittsburgh, Division of Materials Research

Awards: Renewal: Fundamental Physics of Polariton Condensates, G4990753717

OpenAlex ID: W7204842244

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