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Based on the hydrodynamic model, gap soliton of a superfluid fermion gas in optical lattices was discussed. By using the variational method, the condition for existing gap soliton is obtained. It is found that, when the system crosses from Bose-Eingtein condensation side to the BCS side, the condition for existing gap soliton and the structure of gap soliton are very different.
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Keywords:
- superfluid Fermi gas /
- optical lattices /
- gap solitons
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[2] Regal C 2004 Phys. Rev. Lett. 92 040403
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[13] Kim Y E, Zubarev A L 2004 Phys. Rev. A 70 033612
[14] Manini N, Salasnich L 2005 Phys. Rev. A 71 033625
[15] Wen W, Zhou Y, Huang G X 2008 Phys. Rev. A 77 033623
[16] Dong H, Ma Y L 2009 Chin. Phys. B 18 0715
[17] Chin C, Bartenstein M, Altmeyer A 2004 Science 305 5687
[18] Zhang A X , Xue J K 2009 Phy. Rev. A 80 043617
[19] Xue J K, Zhang A X 2008 Phys. Rev. Lett. 101 180401
[20] Kim Y E, Zubarev A L 2004 Phys. Rev. A 70 033612
[21] Hu H, Minguzzi, Liu X J, Tosi M P 2004 Phys. Rev. Lett. 93 190413
[22] Heiselberg H 2004 Phys. Rev. Lett. 93 040402
[23] Bulgac A, Bertsch G F 2005 Phys. Rev. Lett. 94 070401
[24] Manini N, Salasnich L 2005 Phys. Rev. A 71 033625
[25] Astrakharchik G E, Combescot R, Leyronas X, Stringari S 2005 Phys. Rev. Lett. 95 030404
[26] Adhikari S K, Malomed B A 2007 Europhys. Lett. 79 50003
[27] Perez-Garcoa V M, Michinel H, Cirac J I, Lewenstein M, Zoller P 1997 Phys. Rev. A 56 1424
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[1] Greiner M 2003 Nature 426 537
[2] Regal C 2004 Phys. Rev. Lett. 92 040403
[3] Hara K M, Hemmer S L, Gehm M E 2002 Science 298 5601
[4] Zhao X D, Xie Z W, Zhang W P 2007 Acta Phys. Sin. 56 6358 (in Chinese) [赵兴东、 些征微、 张卫平 2007 56 6358]
[5] Ma Y, Fu L B, Yang Z A, Liu J 2006 Acta Phys. Sin. 55 5623 (in Chinese) [马 云、 傅立斌、 杨志安、 刘 杰 2006 55 5623]
[6] Zhou L, Kong L B, Zhan M S 2008 Chin. Phys. B 17 1601
[7] Wang G F, Liu B, Fu L B, Zhao H 2007 Acta Phys. Sin. 56 3733 (in Chinese) [王冠芳、 刘 彬、 傅立斌、 赵 鸿 2007 56 3733]
[8] Chin J K 2006 Nature 443 961
[9] Rodriguez M , Tòrma P 2004 Phys. Rev. A 69 041602 (R)
[10] Zhai H , Ho T L 2007 Phys. Rev. Lett. 99 10042
[11] Moon E G , Nikoli Dc' P , Sachdev S 2007 Phys. Rev. Lett. 99 230403
[12] Pitaevskii L P, Stringari S, Orso G 2005 Phys. Rev. A 71 053602
[13] Kim Y E, Zubarev A L 2004 Phys. Rev. A 70 033612
[14] Manini N, Salasnich L 2005 Phys. Rev. A 71 033625
[15] Wen W, Zhou Y, Huang G X 2008 Phys. Rev. A 77 033623
[16] Dong H, Ma Y L 2009 Chin. Phys. B 18 0715
[17] Chin C, Bartenstein M, Altmeyer A 2004 Science 305 5687
[18] Zhang A X , Xue J K 2009 Phy. Rev. A 80 043617
[19] Xue J K, Zhang A X 2008 Phys. Rev. Lett. 101 180401
[20] Kim Y E, Zubarev A L 2004 Phys. Rev. A 70 033612
[21] Hu H, Minguzzi, Liu X J, Tosi M P 2004 Phys. Rev. Lett. 93 190413
[22] Heiselberg H 2004 Phys. Rev. Lett. 93 040402
[23] Bulgac A, Bertsch G F 2005 Phys. Rev. Lett. 94 070401
[24] Manini N, Salasnich L 2005 Phys. Rev. A 71 033625
[25] Astrakharchik G E, Combescot R, Leyronas X, Stringari S 2005 Phys. Rev. Lett. 95 030404
[26] Adhikari S K, Malomed B A 2007 Europhys. Lett. 79 50003
[27] Perez-Garcoa V M, Michinel H, Cirac J I, Lewenstein M, Zoller P 1997 Phys. Rev. A 56 1424
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