Dark lump excitations in superfluid Fermi gases

doi:10.1088/1674-1056/21/11/115202

中国物理B ›› 2012, Vol. 21 ›› Issue (11): 115202-115202.doi: 10.1088/1674-1056/21/11/115202

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇下一篇

Dark lump excitations in superfluid Fermi gases

徐艳霞, 段文山

Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China

收稿日期:2012-03-19 修回日期:2012-04-26 出版日期:2012-10-01 发布日期:2012-10-01
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 91026005 and 11047010), the Natural Science Foundation of Northwest Normal University of China (Grant No. NWNU-KJCXGC-03-48).

Dark lump excitations in superfluid Fermi gases

Xu Yan-Xia (徐艳霞), Duan Wen-Shan (段文山 )

Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China

Received:2012-03-19 Revised:2012-04-26 Online:2012-10-01 Published:2012-10-01
Contact: Duan Wen-Shan E-mail:Duanws@nwnu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 91026005 and 11047010), the Natural Science Foundation of Northwest Normal University of China (Grant No. NWNU-KJCXGC-03-48).

摘要/Abstract

摘要： We study the linear and nonlinear properties of two-dimensional matter-wave pulses in disk-shaped superfluid Fermi gases. Kadomtsev-Petviashvili I (KPI) solitary wave has been realized for superfluid Fermi gases in the limited cases of Bardeen-Cooper-Schrieffer (BCS) regime, Bose-Einstein condensate (BEC) regime, and unitarity regime. One-lump solution as well as one-line soliton solutions for the KPI equation are obtained, and two-line soliton solutions with the same amplitude are also studied in the limited cases. The dependence of the lump propagating velocity and the sound speed of two-dimensional superfluid Fermi gases on the interaction parameter are investigated for the limited cases of BEC and unitarity.

关键词: superfluid Fermi gas, deep BEC regime, unitarity, dark lump excitation

Abstract: We study the linear and nonlinear properties of two-dimensional matter-wave pulses in disk-shaped superfluid Fermi gases. Kadomtsev-Petviashvili I (KPI) solitary wave has been realized for superfluid Fermi gases in the limited cases of Bardeen-Cooper-Schrieffer (BCS) regime, Bose-Einstein condensate (BEC) regime, and unitarity regime. One-lump solution as well as one-line soliton solutions for the KPI equation are obtained, and two-line soliton solutions with the same amplitude are also studied in the limited cases. The dependence of the lump propagating velocity and the sound speed of two-dimensional superfluid Fermi gases on the interaction parameter are investigated for the limited cases of BEC and unitarity.

Key words: superfluid Fermi gas, deep BEC regime, unitarity, dark lump excitation

中图分类号: (Solitons; BGK modes)

52.35.Sb

52.25.Xz (Magnetized plasmas) 05.45.Yv (Solitons)

徐艳霞, 段文山 . Dark lump excitations in superfluid Fermi gases[J]. 中国物理B, 2012, 21(11): 115202-115202.

Xu Yan-Xia (徐艳霞), Duan Wen-Shan (段文山 ). Dark lump excitations in superfluid Fermi gases[J]. Chin. Phys. B, 2012, 21(11): 115202-115202.

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Dark lump excitations in superfluid Fermi gases

Dark lump excitations in superfluid Fermi gases

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