Pairing fluctuations and pseudogap effects in the BCS-BEC crossover regime of a superfluid Fermi gas

R. Watanabe; S. Tsuchiya; Y. Ohashi

doi:10.1016/j.physc.2009.10.037

Pairing fluctuations and pseudogap effects in the BCS-BEC crossover regime of a superfluid Fermi gas

R. Watanabe, S. Tsuchiya, Y. Ohashi

Department of Physics

Research output: Contribution to journal › Article › peer-review

Abstract

We study effects of strong pairing fluctuations on single-particle properties of a superfluid Fermi gas in the BCS-BEC crossover region. Including phase and amplitude fluctuations of the order parameter within the T-matrix approximation, we calculate the superfluid density of states below the superfluid phase transition temperature Tc. We show how the pseudogap appearing in the normal phase above Tc changes into the superfluid gap over the entire BCS-BEC crossover region, as one passes through Tc.

Original language	English
Pages (from-to)	S980-S981
Journal	Physica C: Superconductivity and its applications
Volume	470
Issue number	SUPPL.1
DOIs	https://doi.org/10.1016/j.physc.2009.10.037
Publication status	Published - 2010 Dec

Keywords

Atomic Fermi gas
BCS-BEC crossover
Pseudogap
Superfluid

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1016/j.physc.2009.10.037

Cite this

@article{08b4f376331a40bc8ed074289924b920,

title = "Pairing fluctuations and pseudogap effects in the BCS-BEC crossover regime of a superfluid Fermi gas",

abstract = "We study effects of strong pairing fluctuations on single-particle properties of a superfluid Fermi gas in the BCS-BEC crossover region. Including phase and amplitude fluctuations of the order parameter within the T-matrix approximation, we calculate the superfluid density of states below the superfluid phase transition temperature Tc. We show how the pseudogap appearing in the normal phase above Tc changes into the superfluid gap over the entire BCS-BEC crossover region, as one passes through Tc.",

keywords = "Atomic Fermi gas, BCS-BEC crossover, Pseudogap, Superfluid",

author = "R. Watanabe and S. Tsuchiya and Y. Ohashi",

note = "Funding Information: This work was supported by a Grant-in-Aid for Scientific Research from MEXT in Japan ( 18043005, 20500044 ).",

year = "2010",

month = dec,

doi = "10.1016/j.physc.2009.10.037",

language = "English",

volume = "470",

pages = "S980--S981",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier",

number = "SUPPL.1",

}

TY - JOUR

T1 - Pairing fluctuations and pseudogap effects in the BCS-BEC crossover regime of a superfluid Fermi gas

AU - Watanabe, R.

AU - Tsuchiya, S.

AU - Ohashi, Y.

N1 - Funding Information: This work was supported by a Grant-in-Aid for Scientific Research from MEXT in Japan ( 18043005, 20500044 ).

PY - 2010/12

Y1 - 2010/12

N2 - We study effects of strong pairing fluctuations on single-particle properties of a superfluid Fermi gas in the BCS-BEC crossover region. Including phase and amplitude fluctuations of the order parameter within the T-matrix approximation, we calculate the superfluid density of states below the superfluid phase transition temperature Tc. We show how the pseudogap appearing in the normal phase above Tc changes into the superfluid gap over the entire BCS-BEC crossover region, as one passes through Tc.

AB - We study effects of strong pairing fluctuations on single-particle properties of a superfluid Fermi gas in the BCS-BEC crossover region. Including phase and amplitude fluctuations of the order parameter within the T-matrix approximation, we calculate the superfluid density of states below the superfluid phase transition temperature Tc. We show how the pseudogap appearing in the normal phase above Tc changes into the superfluid gap over the entire BCS-BEC crossover region, as one passes through Tc.

KW - Atomic Fermi gas

KW - BCS-BEC crossover

KW - Pseudogap

KW - Superfluid

UR - http://www.scopus.com/inward/record.url?scp=78649718126&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78649718126&partnerID=8YFLogxK

U2 - 10.1016/j.physc.2009.10.037

DO - 10.1016/j.physc.2009.10.037

M3 - Article

AN - SCOPUS:78649718126

SN - 0921-4534

VL - 470

SP - S980-S981

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - SUPPL.1

ER -

Pairing fluctuations and pseudogap effects in the BCS-BEC crossover regime of a superfluid Fermi gas

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this