Spectral response of magnetically trapped Bose gases to weak microwave fields

被引：6

作者：

Federsel, P. ^{[1
]}

Rogulj, C. ^{[1
]}

Menold, T. ^{[1
]}

Fortagh, J. ^{[1
]}

Guenther, A. ^{[1
]}

机构：

[1] Univ Tubingen, Phys Inst, D-72076 Tubingen, Germany

来源：

PHYSICAL REVIEW A | 2015年 / 92卷 / 03期

关键词：

ATOM LASER; EINSTEIN CONDENSATE; OUTPUT COUPLER;

D O I：

10.1103/PhysRevA.92.033601

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Microwave fields can be used to drive local spin transitions in quantum gases and for outcoupling of cold atomic beams from magnetic traps. In this paper, we derive an analytic theory for the outcoupling rate as a response to weak microwave fields of varying frequency and power. The theory holds for thermal clouds and Bose-Einstein condensates. It allows for calculating transition rates in arbitrary magnetic trap geometries and includes the effect of gravity. We verify our theory by measuring the flux of outcoupled atoms at the single-particle level. The derived spectral response is important for magnetic noise spectroscopy with quantum gases, and for probing quantum gas dynamics with single atom detectors in real time.

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页数：6

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