Convergence of a renormalization-group approach to dimer-dimer scattering

Michael C. Birse; Boris Krippa; Niels R. Walet

doi:10.1103/PhysRevA.83.023621

Convergence of a renormalization-group approach to dimer-dimer scattering

Michael C. Birse, Boris Krippa, Niels R. Walet

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

Abstract

We study the convergence of a functional renormalization group technique by looking at the ratio between the fermion-fermion scattering length and the dimer-dimer scattering length for a system of nonrelativistic fermions. We find that in a systematic expansion in powers of the fields there is a rapid convergence of the result that agrees with known exact results. © 2011 American Physical Society.

Original language	English
Article number	023621
Journal	Physical Review A
Volume	83
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevA.83.023621
Publication status	Published - 28 Feb 2011

Keywords

Condensed Matter - Quantum Gases
Nuclear Theory
Physics - Atomic Physics

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10.1103/PhysRevA.83.023621

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title = "Convergence of a renormalization-group approach to dimer-dimer scattering",

abstract = "We study the convergence of a functional renormalization group technique by looking at the ratio between the fermion-fermion scattering length and the dimer-dimer scattering length for a system of nonrelativistic fermions. We find that in a systematic expansion in powers of the fields there is a rapid convergence of the result that agrees with known exact results. {\textcopyright} 2011 American Physical Society.",

keywords = "Condensed Matter - Quantum Gases, Nuclear Theory, Physics - Atomic Physics",

author = "Birse, {Michael C.} and Boris Krippa and Walet, {Niels R.}",

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AU - Birse, Michael C.

AU - Krippa, Boris

AU - Walet, Niels R.

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PY - 2011/2/28

Y1 - 2011/2/28

N2 - We study the convergence of a functional renormalization group technique by looking at the ratio between the fermion-fermion scattering length and the dimer-dimer scattering length for a system of nonrelativistic fermions. We find that in a systematic expansion in powers of the fields there is a rapid convergence of the result that agrees with known exact results. © 2011 American Physical Society.

AB - We study the convergence of a functional renormalization group technique by looking at the ratio between the fermion-fermion scattering length and the dimer-dimer scattering length for a system of nonrelativistic fermions. We find that in a systematic expansion in powers of the fields there is a rapid convergence of the result that agrees with known exact results. © 2011 American Physical Society.

KW - Condensed Matter - Quantum Gases

KW - Nuclear Theory

KW - Physics - Atomic Physics

U2 - 10.1103/PhysRevA.83.023621

DO - 10.1103/PhysRevA.83.023621

M3 - Article

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VL - 83

JO - Physical Review A

JF - Physical Review A

IS - 2

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Convergence of a renormalization-group approach to dimer-dimer scattering

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Keywords

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