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Title: Spatial dynamics and spin squeezing in Bose-Einstein condensates

Abstract

We develop a cumulant based formalism to deterministically calculate the lowest order quantum fluctuations of a two-component Bose-Einstein condensate. We use this to study spin squeezing induced by the atom-atom interaction nonlinearity. Our formalism naturally accounts for the multimode spatial description of the condensate, extending previous spin squeezing work which assumed a single spatial mode. We study spin squeezing in both the miscible and immiscible (phase separating) regimes for the scattering lengths. In the miscible regime, we find the squeezing parameter deviates very little from the single spatial mode approach, while in the phase separating regime, we find the squeezing is slightly reduced, though significant squeezing still occurs.

Authors:
 [1];  [2]
  1. Department of Physics, University of Maryland, Baltimore County, Baltimore, Maryland 21250 (United States)
  2. Naval Research Laboratory, Washington, DC 20375 (United States)
Publication Date:
OSTI Identifier:
20982169
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 75; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevA.75.023618; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ATOMS; BOSE-EINSTEIN CONDENSATION; CONDENSATES; FLUCTUATIONS; INTERACTIONS; NONLINEAR PROBLEMS; SCATTERING LENGTHS; SPIN

Citation Formats

Thanvanthri, Sulakshana, and Dutton, Zachary. Spatial dynamics and spin squeezing in Bose-Einstein condensates. United States: N. p., 2007. Web. doi:10.1103/PHYSREVA.75.023618.
Thanvanthri, Sulakshana, & Dutton, Zachary. Spatial dynamics and spin squeezing in Bose-Einstein condensates. United States. doi:10.1103/PHYSREVA.75.023618.
Thanvanthri, Sulakshana, and Dutton, Zachary. Thu . "Spatial dynamics and spin squeezing in Bose-Einstein condensates". United States. doi:10.1103/PHYSREVA.75.023618.
@article{osti_20982169,
title = {Spatial dynamics and spin squeezing in Bose-Einstein condensates},
author = {Thanvanthri, Sulakshana and Dutton, Zachary},
abstractNote = {We develop a cumulant based formalism to deterministically calculate the lowest order quantum fluctuations of a two-component Bose-Einstein condensate. We use this to study spin squeezing induced by the atom-atom interaction nonlinearity. Our formalism naturally accounts for the multimode spatial description of the condensate, extending previous spin squeezing work which assumed a single spatial mode. We study spin squeezing in both the miscible and immiscible (phase separating) regimes for the scattering lengths. In the miscible regime, we find the squeezing parameter deviates very little from the single spatial mode approach, while in the phase separating regime, we find the squeezing is slightly reduced, though significant squeezing still occurs.},
doi = {10.1103/PHYSREVA.75.023618},
journal = {Physical Review. A},
number = 2,
volume = 75,
place = {United States},
year = {Thu Feb 15 00:00:00 EST 2007},
month = {Thu Feb 15 00:00:00 EST 2007}
}