Simple model of a Feshbach resonance in the strong-coupling regime

被引：5

作者：

Wasak, T. ^{[1
]}

Krych, M. ^{[1
]}

Idziaszek, Z. ^{[1
]}

Trippenbach, M. ^{[1
]}

Avishai, Y. ^{[2
,3
]}

Band, Y. B. ^{[3
,4
,5
]}

机构：

[1] Univ Warsaw, Fac Phys, PL-02093 Warsaw, Poland

[2] Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel

[3] Ben Gurion Univ Negev, Ilse Katz Ctr Nanosci, IL-84105 Beer Sheva, Israel

[4] Ben Gurion Univ Negev, Dept Phys, Dept Chem, IL-84105 Beer Sheva, Israel

[5] Ben Gurion Univ Negev, Dept Electroopt, IL-84105 Beer Sheva, Israel

来源：

PHYSICAL REVIEW A | 2014年 / 90卷 / 05期

基金：

以色列科学基金会;

关键词：

FANO INTERFERENCE; NUCLEAR REACTIONS; UNIFIED THEORY; SCATTERING; MOLECULES;

D O I：

10.1103/PhysRevA.90.052719

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We use the dressed potentials obtained in the adiabatic representation of two coupled channels to calculate s-wave Feshbach resonances in a three-dimensional spherically symmetric potential with an open channel interacting with a closed channel. Analytic expressions for the s-wave scattering length a and number of resonances are obtained for a piecewise constant model with a piecewise constant interaction of the open and closed channels near the origin. We show analytically and numerically that, for strong enough coupling strength, Feshbach resonances can exist even when the closed channel does not have a bound state.

引用

页数：8

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