Close-coupled model of Feshbach resonances in ultracold 3He* and 4He* atomic collisions

被引：4

作者：

Hirsch, T. M. F. ^{[1
,2
]}

Cocks, D. G. ^{[1
]}

Hodgman, S. S. ^{[1
]}

机构：

[1] Australian Natl Univ, Res Sch Phys, Canberra, ACT 0200, Australia

[2] Univ Queensland, Sch Math & Phys, St Lucia, Qld 4072, Australia

来源：

PHYSICAL REVIEW A | 2021年 / 104卷 / 03期

基金：

澳大利亚研究理事会;

关键词：

MAGNETIC-MOMENT; HELIUM; CONDENSATION; STATE;

D O I：

10.1103/PhysRevA.104.033317

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Helium atoms in the metastable 2 S-3(1) state (He*) have unique advantages for ultracold atomic experiments. However, there is no known accessible Feshbach resonance in He* which could be used to manipulate the scattering length and hence unlock several new experimental possibilities. Previous experimental and theoretical studies for He* have produced contradictory results. We aimed to resolve this discrepancy with a theoretical search for Feshbach resonances, using a close-coupled model of He* collisions in the presence of an external magnetic field. Several resonances were detected and the existing literature discrepancy was resolved. Although none of the resonances identified are readily experimentally usable, an interesting non-Feshbach scattering length variation with magnetic field was observed in heteronuclear collisions, at field strengths that are experimentally accessible.

引用

页数：7

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