Electric-field-modified Feshbach resonances in ultracold atom-molecule collision

doi:10.1088/1674-1056/26/1/013402

Abstract

We present a detailed analysis of near zero-energy Feshbach resonances in ultracold collisions of atom and molecule, taking the He-PH system as an example, subject to superimposed electric and magnetic static fields. We find that the electric field can induce Feshbach resonance which cannot occur when only a magnetic field is applied, through couplings of the adjacent rotational states of different parities. We show that the electric field can shift the position of the magnetic Feshbach resonance, and change the amplitude of resonance significantly. Finally, we demonstrate that, for narrow magnetic Feshbach resonance as in most cases of ultracold atom-molecule collision, the electric field may be used to modulate the resonance, because the width of resonance in electric field scale is relatively larger than that in magnetic field scale.

Keywords: Feshbach resonance ultracold atom-molecule collision

Received: 23 July 2016
Revised: 25 October 2016
Accepted manuscript online:

PACS:	34.50.-s	(Scattering of atoms and molecules)
	37.90.+j	(Other topics in mechanical control of atoms, molecules, and ions)

Fund:

Project supported by the National Natural Science Foundation of China (Grant Nos. 10874001 and 11374014).

Corresponding Authors: Eryin Feng
E-mail: fengbf@mail.ahnu.edu.cn

Cite this article:

Dong Cheng(程冬), Ya Li(李亚), Eryin Feng(凤尔银), Wuying Huang(黄武英) Electric-field-modified Feshbach resonances in ultracold atom-molecule collision 2017 Chin. Phys. B 26 013402

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