Superfluid density of states and pseudogap phenomenon in the BCS-BEC crossover regime of a superfluid Fermi gas

Physical Review A - Atomic, Molecular, and Optical Physics

Volumn 82, Issue 4, 2010, Pages

  Watanabe, Ryota ^a   Tsuchiya, Shunji ^b,c   Ohashi, Yoji ^a,c  

^a KEIO UNIVERSITY   (Japan)

^b TOKYO UNIVERSITY OF SCIENCE   (Japan)

^c JAPAN SCIENCE AND TECHNOLOGY AGENCY   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

AMPLITUDE FLUCTUATIONS; BCS-BEC CROSSOVER; CROSSOVER REGIONS; INTERACTION STRENGTH; NORMAL STATE; ONE-PASS; PAIRING FLUCTUATIONS; PSEUDO-GAP; SINGLE PARTICLE EXCITATIONS; SINGLE-PARTICLE; SPECTRAL WEIGHT; STRONG-COUPLING; SUPERFLUID DENSITY; SUPERFLUID FERMI GAS; SUPERFLUID GAP; SUPERFLUID ORDER PARAMETER; SUPERFLUID TRANSITION TEMPERATURE; T-MATRIX THEORY; WEAK COUPLINGS;

ELECTRON GAS; PHASE DIAGRAMS;

FERMIONS;

EID: 78650945969     PISSN: 10502947     EISSN: 10941622     Source Type: Journal    
DOI: 10.1103/PhysRevA.82.043630     Document Type: Article

References (49)

1. D. M. Eagles, Phys. Rev. PHRVAO 0031-899X 10.1103/PhysRev.186.456 186, 456 (1969).
2. A. J. Leggett, in Modern Trends in the Theory of Condensed Matter, edited by, A. Pekalski, and, J. Przystawa, (Springer, Berlin, 1980), p. 14.
3. P. Nozières and S. Schmitt-Rink, J. Low Temp. Phys. JLTPAC 0022-2291 10.1007/BF00683774 59, 195 (1985).
4. C. A. R. Sa de Melo, M. Randeria, and J. R. Engelbrecht, Phys. Rev. Lett. PRLTAO 0031-9007 10.1103/PhysRevLett.71.3202 71, 3202 (1993).
5. C. A. Regal, M. Greiner, and D. S. Jin, Phys. Rev. Lett. PRLTAO 0031-9007 10.1103/PhysRevLett.92.040403 92, 040403 (2004).
6. M. W. Zwierlein, C. A. Stan, C. H. Schunck, S. M. F. Raupach, A. J. Kerman, and W. Ketterle, Phys. Rev. Lett. PRLTAO 0031-9007 10.1103/PhysRevLett. 92.120403 92, 120403 (2004).
7. J. Kinast, S. L. Hemmer, M. E. Gehm, A. Turlapov, and J. E. Thomas, Phys. Rev. Lett. PRLTAO 0031-9007 10.1103/PhysRevLett.92.150402 92, 150402 (2004).
8. M. Bartenstein, A. Altmeyer, S. Riedl, S. Jochim, C. Chin, J. H. Denschlag, and R. Grimm, Phys. Rev. Lett. PRLTAO 0031-9007 10.1103/PhysRevLett. 92.203201 92, 203201 (2004).
9. E. Timmermans, K. Furuya, P. W. Milonni, and A. K. Kerman, Phys. Lett. A PYLAAG 0375-9601 10.1016/S0375-9601(01)00346-2 285, 228 (2001). (Pubitemid 32655782)
10. M. Holland, S. J. J. M. F. Kokkelmans, M. L. Chiofalo, and R. Walser, Phys. Rev. Lett. PRLTAO 0031-9007 10.1103/PhysRevLett.87.120406 87, 120406 (2001).
11. Y. Ohashi and A. Griffin, Phys. Rev. Lett. PRLTAO 0031-9007 10.1103/PhysRevLett.89.130402 89, 130402 (2002).
12. S. Giorgini, S. Pitaevskii, and S. Stringari, Rev. Mod. Phys. RMPHAT 0034-6861 10.1103/RevModPhys.80.1215 80, 1215 (2008).
13. I. Bloch, J. Dalibard, and W. Zwerger, Rev. Mod. Phys. RMPHAT 0034-6861 10.1103/RevModPhys.80.885 80, 885 (2008).
14. W. Ketterle and M. W. Zwierlein, in Proceedings of the International School of Physics "Enrico Fermi," Course CLXIV, edited by, M. Inguscio,,, W. Ketterle,, and, C. Salomon, (IOS Press, Amsterdam, 2008).
15. P. Lee, N. Nagaosa, and X. Wen, Rev. Mod. Phys. RMPHAT 0034-6861 10.1103/RevModPhys.78.17 78, 17 (2006). (Pubitemid 43279669)
16. J. T. Stewart, C. A. Regal, and D. S. Jin, Nature (London) NATUAS 0028-0836 10.1038/nature07172 454, 744 (2008).
17. S. Tsuchiya, R. Watanabe, and Y. Ohashi, Phys. Rev. A PLRAAN 1050-2947 10.1103/PhysRevA.82.033629 82, 033629 (2010).
18. Q. J. Chen and K. Levin, Phys. Rev. Lett. PRLTAO 0031-9007 10.1103/PhysRevLett.102.190402 102, 190402 (2009).
19. A. Damascelli, Z. Hussain, and Z. Shen, Rev. Mod. Phys. RMPHAT 0034-6861 10.1103/RevModPhys.75.473 75, 473 (2003). (Pubitemid 36737414)
20. J. P. Gaebler, J. T. Stewart, T. E. Drake, D. S. Jin, A. Perali, P. Pieri, and G. C. Strinati, Nature Phys. 1745-2473 10.1038/nphys1709 6, 569 (2010).
21. O. Fischer, M. Kugler, I. Maggio-Aprile, C. Berthod, and C. Renner, Rev. Mod. Phys. RMPHAT 0034-6861 10.1103/RevModPhys.79.353 79, 353 (2007) (Pubitemid 46420257)
22. A. Perali, P. Pieri, G. C. Strinati, and C. Castellani, Phys. Rev. B PLRBAQ 1098-0121 10.1103/PhysRevB.66.024510 66, 024510 (2002).
23. Y. Yanase, Phys. Rep. PRPLCM 0370-1573 10.1016/j.physrep.2003.07.002 387, 1 (2003). (Pubitemid 37282154)
24. Y. Yanase and K. Yamada, J. Phys. Soc. Jpn. JUPSAU 0031-9015 10.1143/JPSJ.70.1659 70, 1659 (2001).
25. J. M. Singer, M. H. Pedersen, T. Schneider, H. Beck, and H.-G. Matuttis, Phys. Rev. B PLRBAQ 1098-0121 10.1103/PhysRevB.54.1286 54, 1286 (1996).
26. B. Janko, J. Maly, and K. Levin, Phys. Rev. B PLRBAQ 1098-0121 10.1103/PhysRevB.56.R11407 56, R11407 (1997).
27. D. Rohe and W. Metzner, Phys. Rev. B PLRBAQ 1098-0121 10.1103/PhysRevB.63.224509 63, 224509 (2001).
28. D. Pines, Z. Phys. B ZPCMDN 0722-3277 10.1007/s002570050346 103, 129 (1997), and references therein.
29. A. Kampf and J. R. Schrieffer, Phys. Rev. B PLRBAQ 1098-0121 10.1103/PhysRevB.41.6399 41, 6399 (1990).
30. M. Randeria, N. Trivedi, A. Moreo, and R. T. Scalettar, Phys. Rev. Lett. PRLTAO 0031-9007 10.1103/PhysRevLett.69.2001 69, 2001 (1992).
31. Y. Yanase, J. Phys. Soc. Jpn. JUPSAU 0031-9015 10.1143/JPSJ.75.124715 75, 124715 (2006).
32. S. Chakravarty, R. B. Laughlin, D. K. Morr, and C. Nayak, Phys. Rev. B PLRBAQ 1098-0121 10.1103/PhysRevB.63.094503 63, 094503 (2001).
33. S. Tsuchiya, R. Watanabe, and Y. Ohashi, Phys. Rev. A PLRAAN 1050-2947 10.1103/PhysRevA.80.033613 80, 033613 (2009).
34. C. C. Chien, H. Guo, Y. He, and K. Levin, Phys. Rev. A PLRAAN 1050-2947 10.1103/PhysRevA.81.023622 81, 023622 (2010).
35. S. Q. Su, D. E. Sheehy, J. Moreno, and M. Jarrell, Phys. Rev. A PLRAAN 1050-2947 10.1103/PhysRevA.81.051604 81, 051604 (2010).
36. R. Haussmann, M. Punk, and W. Zwerger, Phys. Rev. A PLRAAN 1050-2947 10.1103/PhysRevA.80.063612 80, 063612 (2009).
37. H. Hu, X. J. Liu, P. D. Drummond, and H. Dong, Phys. Rev. Lett. PRLTAO 0031-9007 10.1103/PhysRevLett.104.240407 104, 240407 (2010).
38. P. Magierski, G. Wlazlowski, A. Bulgac, and J. E. Drut, Phys. Rev. Lett. PRLTAO 0031-9007 10.1103/PhysRevLett.103.210403 103, 210403 (2009).
39. P. Pieri, L. Pisani, and G. C. Strinati, Phys. Rev. B PLRBAQ 1098-0121 10.1103/PhysRevB.70.094508 70, 094508 (2004).
40. M. Randeria, in Bose-Einstein Condensation, edited by, A. Griffin,,, D. W. Snoke,, and, S. Stringari, (Cambridge University Press, New York, 1995), p. 355.
41. Y. Ohashi and S. Takada, J. Phys. Soc. Jpn. JUPSAU 0031-9015 10.1143/JPSJ.66.2437 66, 2437 (1997).
42. 1 (q) (although we do not explicitly show this in the text).
43. N. Fukushima, Y. Ohashi, E. Taylor, and A. Griffin, Phys. Rev. A PLRAAN 1050-2947 10.1103/PhysRevA.75.033609 75, 033609 (2007). (Pubitemid 46474044)
44. Y. Ohashi, J. Phys. Soc. Jpn. JUPSAU 0031-9015 10.1143/JPSJ.74.2659 74, 2659 (2005). (Pubitemid 41500643)
45. C. Renner, B. Revaz, J.-Y. Genoud, K. Kadowaki, and O. Fischer, Phys. Rev. Lett. PRLTAO 0031-9007 10.1103/PhysRevLett.80.149 80, 149 (1998).
46. We briefly note that, although the upper branch in SW at T = 0 looks to be smeared out at ω 1, this peak line actually becomes sharp and narrow at higher energy ω 2.
47. R. Haussmann, Z. Phys. B ZPCMDN 0722-3277 10.1007/BF01344058 91, 291 (1993).
48. s) ⊃- 1 ≤ 0.5.
49. cp as the temperature where the upper coherence peak appears in DOS.