BCS-BEC crossover with a finite-range interaction

Meera M. Parish; Bogdan Mihaila; Eddy M. Timmermans; Krastan B. Blagoev; Peter B. Littlewood

doi:10.1103/PhysRevB.71.064513

BCS-BEC crossover with a finite-range interaction

Meera M. Parish
, Bogdan Mihaila
, Eddy M. Timmermans
, Krastan B. Blagoev
, Peter B. Littlewood

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

41 Citations (Scopus)

Abstract

We study the crossover from BEC to BCS pairing for dilute systems but with a realistic finite-range interaction. We exhibit the changes in the excitation spectrum that provide a clean qualitative distinction between the two limits. We also study how the dilute system converges to the results from a zero-range pseudopotential derived by Leggett.

Original language	English
Article number	064513
Journal	Physical Review B
Volume	71
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevB.71.064513
Publication status	Published - 1 Feb 2005
Externally published	Yes

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10.1103/PhysRevB.71.064513

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title = "BCS-BEC crossover with a finite-range interaction",

abstract = "We study the crossover from BEC to BCS pairing for dilute systems but with a realistic finite-range interaction. We exhibit the changes in the excitation spectrum that provide a clean qualitative distinction between the two limits. We also study how the dilute system converges to the results from a zero-range pseudopotential derived by Leggett.",

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AU - Mihaila, Bogdan

AU - Timmermans, Eddy M.

AU - Blagoev, Krastan B.

AU - Littlewood, Peter B.

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AB - We study the crossover from BEC to BCS pairing for dilute systems but with a realistic finite-range interaction. We exhibit the changes in the excitation spectrum that provide a clean qualitative distinction between the two limits. We also study how the dilute system converges to the results from a zero-range pseudopotential derived by Leggett.

UR - https://www.scopus.com/pages/publications/16344387917

U2 - 10.1103/PhysRevB.71.064513

DO - 10.1103/PhysRevB.71.064513

M3 - Article

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SN - 1098-0121

VL - 71

JO - Physical Review B

JF - Physical Review B

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ER -

BCS-BEC crossover with a finite-range interaction

Abstract

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