Estimation of phase diffusion rates in a condensate interferometer using the Gross-Pitaevskii Equation

2013/10/30 by Adam Fallon, A. Fallon, Robert H. Leonard +5
Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Quantum Gases (cond-mat.quant-gas) #Quantum, superfluid, helium dynamics #cond-mat.quant-gas

paper · pdf · doi:10.48550/arxiv.1310.8306

5 pages, 6 figures

openalex publication_date 2013/10/30 · arxiv created 2014/01/03 · arxiv updated 2014/01/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Atom interferometers using Bose-Einstein condensates are fundamentally limited by a phase diffusion process that arises from atomic interactions. The Gross-Pitaevskii equation is here used to accurately calculate the diffusion rate for a Bragg interferometer. It is seen to agree with a Thomas-Fermi approximation at large atom numbers and a perturbative approximation at low atom numbers. The diffusion times obtained are generally longer than the coherence times observed in experiments to date.

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