Fluctuations between the BCS and BEC Limits in the System of Ultracold Alkali Atoms

• Authors: T Domański , A Donabidowicz
• Languages of publication: EN

Abstracts

EN

We investigate the fluctuations induced by time-dependent interchange between the Bardeen-Cooper-Schrieffer and Bose-Einstein condensation regimes in the ultracold gas of fermion atoms. Such crossover can be triggered by varying the external magnetic field across the Feshbach resonance. Experimental realization is usually done via very fast switching which leads to the nonequilibrium effects. In this paper we focus on the ground state properties. In particular, we analyze time dependence of the wave function and consider fluctuations of the order parameters.

Keywords

EN

74.20.Mn; 03.75.Kk; 03.75.Ss

Discipline

• 03.75.Kk: Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow
• 03.75.Ss: Degenerate Fermi gases
• 74.20.Mn: Nonconventional mechanisms

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2006
• Volume: 109
• Issue: 4-5
• Pages: 471-476

Dates

published

2006-04

received

2005-09-25

Contributors

author

T Domański

• Institute of Physics, M. Curie Skłodowska University, pl. M. Curie-Skłodowskiej 1, 20-031 Lublin, Poland

author

A Donabidowicz

• Institute of Physics, M. Curie Skłodowska University, pl. M. Curie-Skłodowskiej 1, 20-031 Lublin, Poland

References

• 1. M. Greiner, C.A. Regal, D.S. Jin, cond-mat/0502539
• 2. R.A. Duine, H.T.C. Stoof, Phys. Rep., 396, 115, 2004
• 3. S. Jochim, M. Bartenstein, A. Altmeyer, G. Hendl, S. Riedl, C. Chin, J. Hecker Denschlag, R. Grimm, Science, 302, 2101, 2003; M.W. Zwierlein, C.A. Stan, C.H. Schunck, S.M.F. Raupach, S. Gupta, Z. Hadzibabic, W. Ketterle, Phys. Rev. Lett., 91, 250401, 2003; M. Greiner, C.A. Regal, D.S. Jin, Nature, 426, 537, 2003; T. Bourdel, L. Khaykovich, J. Cubizolles, J. Zhang, F. Chevy, M. Teichmann, L. Tarruell, S.J.J.M.F. Kokkelmans, C. Salomon, Phys. Rev. Lett., 93, 050401, 2004
• 4. T. Domański, Phys. Rev. A, 68, 013603, 2003
• 5. C.A. Regal, M. Greiner, D.S. Jin, Phys. Rev. Lett., 92, 040403, 2004; M.W. Zwierlein, C.A. Stan, C.H. Schunck, S.M.F. Raupach, A.J. Kerman, W. Ketterle, Phys. Rev. Lett., 92, 120403, 2004; J. Kinast, S.L. Hemmer, M.E. Gehm, A. Turlapov, J.E. Thomas, Phys. Rev. Lett., 92, 150402, 2004; C. Chin, M. Bartenstein, A. Altmeyer, S. Riedl, S. Jochim, J. Hecker Denschlag, R. Grimm, Science, 305, 1128, 2004
• 6. D.M. Eagles, Phys. Rev., 186, 456, 69; A.J. Leggett, J. Phys. (Paris), 41, 7, 1980; S. Robaszkiewicz, R. Micnas, K.A. Chao, Phys. Rev. B, 23, 1447, 1981; P. Nozieres, S. Schmitt-Rink, J. Low Temp. Phys., 59, 195, 1985
• 7. A.V. Andreev, V. Gurarie, L. Radzihovsky, Phys. Rev. Lett., 93, 130402, 2004; R.A. Barankov, L.S. Levitov, Phys. Rev. Lett., 93, 130403, 2004
• 8. M.H. Szymańska, B.D. Simons, K. Burnet, Phys. Rev. Lett., 94, 170402, 2005; M. Haque, H.T.C. Stoof, Phys. Rev. A, 71, 063603, 2005
• 9. M. Holland, S.J.J.M.F. Kokkelmans, M.L. Chiofalo, R. Walser, Phys. Rev. Lett., 87, 120406, 2001
• 10. J. Ranninger, S. Robaszkiewicz, Physica B, 135, 468, 1985; S. Robaszkiewicz, R. Micnas, J. Ranninger, Phys. Rev. B, 36, 180, 1987; J. Ranninger, J.M. Robin, Physica C, 253, 279, 1995
• 11. E. Altman, A. Vishwanath, Phys. Rev. Lett., 95, 110404, 2005
• 12. Y.M. Galperin, V.I. Kozub, B.Z. Spivak, Sov. Phys. JETP, 54, 1126, 1981
• 13. W. Yi, L.-M. Duan, cond-mat/0507540
• 14. P.W. Anderson, Phys. Rev., 112, 1900, 1958
• 15. T. Domanski, cond-mat/0504588
• 16. C.N. Yang, Rev. Mod. Phys., 34, 694, 1962
• 17. J. Kinnunen, M. Rodriguez, P. Torma, Science, 305, 203201, 2004

Identifiers

DOI

10.12693/APhysPolA.109.471