Matter-wave interference in an axial triple-well optical dipole trap

doi:10.1088/1674-1056/19/9/093202

Abstract This paper proposes a scheme of axial triple-well optical dipole trap by employing a simple optical system composed of a circular cosine grating and a lens. Three optical wells separated averagely by ～37 μm were created when illuminating by a YAG laser with power 1 mW. These wells with average trapping depth ～0.5 μK and volume ～74 μm³ are suitable to trap and manipulate an atomic Bose–Einstein condensation (BEC). Due to a controllable grating implemented by a spatial light modulator, an evolution between a triple-well trap and a single-well one is achievable by adjusting the height of potential barrier between adjacent wells. Based on this novel triple-well potentials, the loading and splitting of BEC, as well as the interference between three freely expanding BECs, are also numerically stimulated within the framework of mean-field treatment. By fitting three cosine functions with three Gaussian envelopes to interference fringe, the information of relative phases among three condensates is extracted.

Keywords: triple-well optical trap matter-wave interference spatial light modulator

Received: 11 November 2009
Revised: 08 February 2010
Accepted manuscript online:

PACS:	3280P
	0530
	4225F

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 10434060, 10674047 and 10804031), the National Key Basic Research and Development Program of China (Grant No. 2006CB921604), the Program for Changjiang Scholar and Innovative Research Team, and Shanghai Leading Academic Discipline Project (Grant No. B408), the Youth Foundation of Jiangxi Educational Committee (Grant No. GJJ09530), and the Scientific Research Foundation of ECIT (Grant No. DSH0417).

Cite this article:

Zhou Qi(周琦), Lu Jun-Fa(陆俊发), and Yin Jian-Ping(印建平) Matter-wave interference in an axial triple-well optical dipole trap 2010 Chin. Phys. B 19 093202

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