Pairing in a three-component Fermi gas

Abstract

References (33)

Citing Articles

Download: PDF (675 kB) or Buy this Article (US$25) (Use Article Pack)

T. Paananen,^1,2 J.-P. Martikainen,¹ and P. Törmä²
¹Department of Physical Sciences, University of Helsinki, P.O. Box 64, 00014 University of Helsinki, Finland
²Nanoscience Center, Department of Physics, University of Jyväskylä, P.O. Box 35, 40014 University of Jyväskylä, Finland

Received 20 March 2006; published 10 May 2006

Weconsider pairing in a three-component gas of degenerate fermions. Inparticular, we solve the finite-temperature mean-field theory of an interactinggas for a system where both interaction strengths and fermionmasses can be unequal. At zero temperature, we find thepossibility of a quantum phase transition between states associated withpairing between different pairs of fermions. On the other hand,finite-temperature behavior of the three-component system reveals some qualitative differencesfrom the two-component gas: for a range of parameters itis possible to have two different critical temperatures. The lowerone corresponds to a transition between different pairing channels, whilethe higher one corresponds to the usual superfluid-normal transition. Wediscuss how these phase transitions could be observed in ultracoldgases of fermionic atoms.

URL:	http://link.aps.org/doi/10.1103/PhysRevA.73.053606
DOI:	10.1103/PhysRevA.73.053606
PACS:	03.75.-b; 32.80.Pj; 03.65.-w 03.75.-b Matter waves 32.80.Pj Optical cooling of atoms; trapping 03.65.-w Quantum mechanics YEAR: 2006
KEYWORDS:	fermion systems, phase transformations, quantum theory

REFERENCES (33)

View in Separate Window/Tab

For access to fully linked references, you need to log in. For access to fully linked references, you need to Log in.

R. Casalbuoni and G. Nardulli, Rev. Mod. Phys. 76, 263 (2004).
C. A. Regal, M. Greiner, and 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, and W. Ketterle, Phys. Rev. Lett. 92, 120403 (2004).
M. Bartenstein, A. Altmeyer, S. Riedl, S. Jochim, C. Chin, J. H. Denschlag, and R. Grimm, Phys. Rev. Lett. 92, 203201 (2004).
J. Kinast, S. L. Hemmer, M. E. Gehm, A. Turlapov, and J. E. Thomas, Phys. Rev. Lett. 92, 150402 (2004).
P. F. Bedaque, H. Caldas, and G. Rupak, Phys. Rev. Lett. 91, 247002 (2003).
P. Castorina, M. Grasso, M. Oertel, M. Urban, and D. Zappala, Phys. Rev. A 72, 025601 (2005).
T. Mizushima, K. Machida, and M. Ichioka, Phys. Rev. Lett. 94, 060404 (2005).
K. Yang, Phys. Rev. Lett. 95, 218903 (2005).
D. E. Sheehy and L. Radzihovsky, Phys. Rev. Lett. 96, 060401 (2006).
J. Kinnunen, L. M. Jensen, and P. Törmä, Phys. Rev. Lett. 96, 110403 (2006).
P. Pieri and G. C. Strinati, Phys. Rev. Lett. 96, 150404 (2006).
W. Yi and L.-M. Duan, Phys. Rev. A 73, 034307 (2006).
F. Chevy, Phys. Rev. Lett. 96, 130401 (2006).
C. J. Myatt, E. A. Burt, R. W. Ghrist, E. A. Cornell, and C. E. Wieman, Phys. Rev. Lett. 78, 586 (1997).
G. Modugno, M. Modugno, F. Riboli, G. Roati, and M. Inguscio, Phys. Rev. Lett. 89, 190404 (2002).
G. Roati, F. Riboli, G. Modugno, and M. Inguscio, Phys. Rev. Lett. 89, 150403 (2002).
H. Schmaljohann, M. Erhard, J. Kronjäger, M. Kottke, S. van Staa, L. Cacciapuoti, J. J. Arlt, K. Bongs, and K. Sengstock, Phys. Rev. Lett. 92, 040402 (2004).
C. Honerkamp and W. Hofstetter, Phys. Rev. Lett. 92, 170403 (2004).
C. Honerkamp and W. Hofstetter, Phys. Rev. B 70, 094521 (2004).
P. Törmä and P. Zoller, Phys. Rev. Lett. 85, 487 (2000).