Three-fluid hydrodynamics of spin-1 Bose-Einstein condensates

Gergely Szirmai, P. Szépfalusy

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We study excitations of the spin-1 Bose gas at finite temperatures and in the presence of a not-so-strong magnetic field or, equivalently, when the gas sample is partially polarized. Motivated by the success of two-fluid hydrodynamics of scalar superfluids we develop a three-fluid hydrodynamic description to treat the low-frequency and long-wavelength excitations of the spin-1 Bose gas. We derive coupled linear hydrodynamic equations of the three sounds and evaluate them numerically in a self-consistent mean-field approximation valid for dilute gas in the intermediate and critical temperature regions. In this latter region we identify the critical mode.

Original languageEnglish
Article number053603
JournalPhysical Review A
Volume85
Issue number5
DOIs
Publication statusPublished - May 4 2012

Fingerprint

Bose-Einstein condensates
hydrodynamics
fluids
gases
hydrodynamic equations
excitation
critical temperature
scalars
low frequencies
temperature
acoustics
approximation
magnetic fields
wavelengths

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Three-fluid hydrodynamics of spin-1 Bose-Einstein condensates. / Szirmai, Gergely; Szépfalusy, P.

In: Physical Review A, Vol. 85, No. 5, 053603, 04.05.2012.

Research output: Contribution to journalArticle

@article{0de369ce0eb849a7b60464e121ef9875,
title = "Three-fluid hydrodynamics of spin-1 Bose-Einstein condensates",
abstract = "We study excitations of the spin-1 Bose gas at finite temperatures and in the presence of a not-so-strong magnetic field or, equivalently, when the gas sample is partially polarized. Motivated by the success of two-fluid hydrodynamics of scalar superfluids we develop a three-fluid hydrodynamic description to treat the low-frequency and long-wavelength excitations of the spin-1 Bose gas. We derive coupled linear hydrodynamic equations of the three sounds and evaluate them numerically in a self-consistent mean-field approximation valid for dilute gas in the intermediate and critical temperature regions. In this latter region we identify the critical mode.",
author = "Gergely Szirmai and P. Sz{\'e}pfalusy",
year = "2012",
month = "5",
day = "4",
doi = "10.1103/PhysRevA.85.053603",
language = "English",
volume = "85",
journal = "Physical Review A",
issn = "2469-9926",
publisher = "American Physical Society",
number = "5",

}

TY - JOUR

T1 - Three-fluid hydrodynamics of spin-1 Bose-Einstein condensates

AU - Szirmai, Gergely

AU - Szépfalusy, P.

PY - 2012/5/4

Y1 - 2012/5/4

N2 - We study excitations of the spin-1 Bose gas at finite temperatures and in the presence of a not-so-strong magnetic field or, equivalently, when the gas sample is partially polarized. Motivated by the success of two-fluid hydrodynamics of scalar superfluids we develop a three-fluid hydrodynamic description to treat the low-frequency and long-wavelength excitations of the spin-1 Bose gas. We derive coupled linear hydrodynamic equations of the three sounds and evaluate them numerically in a self-consistent mean-field approximation valid for dilute gas in the intermediate and critical temperature regions. In this latter region we identify the critical mode.

AB - We study excitations of the spin-1 Bose gas at finite temperatures and in the presence of a not-so-strong magnetic field or, equivalently, when the gas sample is partially polarized. Motivated by the success of two-fluid hydrodynamics of scalar superfluids we develop a three-fluid hydrodynamic description to treat the low-frequency and long-wavelength excitations of the spin-1 Bose gas. We derive coupled linear hydrodynamic equations of the three sounds and evaluate them numerically in a self-consistent mean-field approximation valid for dilute gas in the intermediate and critical temperature regions. In this latter region we identify the critical mode.

UR - http://www.scopus.com/inward/record.url?scp=84860659275&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84860659275&partnerID=8YFLogxK

U2 - 10.1103/PhysRevA.85.053603

DO - 10.1103/PhysRevA.85.053603

M3 - Article

AN - SCOPUS:84860659275

VL - 85

JO - Physical Review A

JF - Physical Review A

SN - 2469-9926

IS - 5

M1 - 053603

ER -