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

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

中国物理B ›› 2010, Vol. 19 ›› Issue (9): 93202-093202.doi: 10.1088/1674-1056/19/9/093202

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

陆俊发¹, 印建平², 周琦³

(1)Department of Physics, East China Institute of Technology, Jiangxi Fuzhou 344000, China; (2)State Key Laboratory of Precision Spectroscopy, Department of Physics, East China Normal University, Shanghai 200062, China; (3)State Key Laboratory of Precision Spectroscopy, Department of Physics, East China Normal University, Shanghai 200062, China; Department of Physics, East China Institute of Technology, Jiangxi Fuzhou 344000, China

收稿日期:2009-11-11 修回日期:2010-02-08 出版日期:2010-09-15 发布日期:2010-09-15
基金资助:
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 Innovativ

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

Zhou Qi(周琦)^a)b), Lu Jun-Fa(陆俊发)^b), and Yin Jian-Ping(印建平)^a)†

^a State Key Laboratory of Precision Spectroscopy, Department of Physics, East China Normal University, Shanghai 200062, China; ^b Department of Physics, East China Institute of Technology, Jiangxi Fuzhou 344000, China

Received:2009-11-11 Revised:2010-02-08 Online:2010-09-15 Published:2010-09-15
Supported by:
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).

摘要/Abstract

摘要： 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.

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.

Key words: triple-well optical trap, matter-wave interference, spatial light modulator

中图分类号:

3280P

周琦, 陆俊发, 印建平. Matter-wave interference in an axial triple-well optical dipole trap[J]. 中国物理B, 2010, 19(9): 93202-093202.

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[J]. Chin. Phys. B, 2010, 19(9): 93202-093202.

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

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

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