Excitation spectra of Bose-Einstein condensates in optical lattice

Masanori Ichioka; Kazushige Machida

doi:10.1143/JPSJ.72.2137

Excitation spectra of Bose-Einstein condensates in optical lattice

Masanori Ichioka, Kazushige Machida

Research Institute for Interdisciplinary Science

Research output: Contribution to journal › Article

4 Citations (Scopus)

Abstract

The excitation spectra of Bose-Einstein condensates are investigated in a three-dimensional optical lattice by the Bogoliubov theory considering the original sinusoidal potential for the optical lattice. When the lattice potential becomes high, the excitations show softening at large wavelengths, suggesting the breakdown of superfluidity. We also study the filling and interaction dependences of the properties of the excitation spectra and one-dimensional lattice case.

Original language	English
Pages (from-to)	2137-2140
Number of pages	4
Journal	journal of the physical society of japan
Volume	72
Issue number	9
DOIs	https://doi.org/10.1143/JPSJ.72.2137
Publication status	Published - Sep 1 2003

Keywords

Bogoliubov theory
Bose-Einstein condensates
Excitation spectra
Optical lattice

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.72.2137

Fingerprint Dive into the research topics of 'Excitation spectra of Bose-Einstein condensates in optical lattice'. Together they form a unique fingerprint.

Cite this

@article{29502efa242b4e7ca58bc8bf67a968dc,

title = "Excitation spectra of Bose-Einstein condensates in optical lattice",

abstract = "The excitation spectra of Bose-Einstein condensates are investigated in a three-dimensional optical lattice by the Bogoliubov theory considering the original sinusoidal potential for the optical lattice. When the lattice potential becomes high, the excitations show softening at large wavelengths, suggesting the breakdown of superfluidity. We also study the filling and interaction dependences of the properties of the excitation spectra and one-dimensional lattice case.",

keywords = "Bogoliubov theory, Bose-Einstein condensates, Excitation spectra, Optical lattice",

author = "Masanori Ichioka and Kazushige Machida",

year = "2003",

month = sep,

day = "1",

doi = "10.1143/JPSJ.72.2137",

language = "English",

volume = "72",

pages = "2137--2140",

journal = "Journal of the Physical Society of Japan",

issn = "0031-9015",

publisher = "Physical Society of Japan",

number = "9",

}

TY - JOUR

T1 - Excitation spectra of Bose-Einstein condensates in optical lattice

AU - Ichioka, Masanori

AU - Machida, Kazushige

PY - 2003/9/1

Y1 - 2003/9/1

N2 - The excitation spectra of Bose-Einstein condensates are investigated in a three-dimensional optical lattice by the Bogoliubov theory considering the original sinusoidal potential for the optical lattice. When the lattice potential becomes high, the excitations show softening at large wavelengths, suggesting the breakdown of superfluidity. We also study the filling and interaction dependences of the properties of the excitation spectra and one-dimensional lattice case.

AB - The excitation spectra of Bose-Einstein condensates are investigated in a three-dimensional optical lattice by the Bogoliubov theory considering the original sinusoidal potential for the optical lattice. When the lattice potential becomes high, the excitations show softening at large wavelengths, suggesting the breakdown of superfluidity. We also study the filling and interaction dependences of the properties of the excitation spectra and one-dimensional lattice case.

KW - Bogoliubov theory

KW - Bose-Einstein condensates

KW - Excitation spectra

KW - Optical lattice

UR - http://www.scopus.com/inward/record.url?scp=0242676090&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0242676090&partnerID=8YFLogxK

U2 - 10.1143/JPSJ.72.2137

DO - 10.1143/JPSJ.72.2137

M3 - Article

AN - SCOPUS:0242676090

VL - 72

SP - 2137

EP - 2140

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

SN - 0031-9015

IS - 9

ER -