Dynamic projection on feshbach molecules: A probe of pairing and phase fluctuations

被引：60

作者：

Altman, E ^{[1
]}

Vishwanath, A

机构：

[1] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[2] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.95.110404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We describe and justify a simple model for the dynamics associated with rapid sweeps across a Feshbach resonance, from the atomic to the molecular side, in an ultracold Fermi system. The model allows us to relate the observed molecule momentum distribution to equilibrium properties of the initial state. In particular, the dependence of the total molecule number on the sweep rate is found to be a sensitive probe of pairing in the initial state, whether condensed or not. This can be used to establish the presence of a phase fluctuation induced "pseudogap" phase in these systems.

引用

收藏

页数：4

相关论文

共 20 条

[1]

ALTMAN E, IN PRESS

[2] Nonequilibrium dynamics and thermodynamics of a degenerate Fermi gas across a Feshbach resonance [J].

Andreev, AV ;

Gurarie, V ;

Radzihovsky, L .

PHYSICAL REVIEW LETTERS, 2004, 93 (13) :130402-1

[3] Pair wave functions in atomic Fermi condensates [J].

Avdeenkov, AV ;

Bohn, JL .

PHYSICAL REVIEW A, 2005, 71 (02)

[4] Atom-molecule coexistence and collective dynamics near a Feshbach resonance of cold fermions [J].

Barankov, RA ;

Levitov, LS .

PHYSICAL REVIEW LETTERS, 2004, 93 (13) :130403-1

[5] Collective Rabi oscillations and solitons in a time-dependent BCS pairing problem [J].

Barankov, RA ;

Levitov, LS ;

Spivak, BZ .

PHYSICAL REVIEW LETTERS, 2004, 93 (16) :160401-1

[6] Crossover from a molecular Bose-Einstein condensate to a degenerate Fermi gas [J].

Bartenstein, M ;

Altmeyer, A ;

Riedl, S ;

Jochim, S ;

Chin, C ;

Denschlag, JH ;

Grimm, R .

PHYSICAL REVIEW LETTERS, 2004, 92 (12) :120401-1

[7] Measurement of the interaction energy near a feshbach resonance in a 6Li Fermi gas -: art. no. 020402 [J].

Bourdel, T ;

Cubizolles, J ;

Khaykovich, L ;

Magalhaes, KMF ;

Kokkelmans, SJJMF ;

Shlyapnikov, GV ;

Salomon, C .

PHYSICAL REVIEW LETTERS, 2003, 91 (02)

[8]

DIENER RB, CONDMAT0404517

[9] POSSIBLE PAIRING WITHOUT SUPERCONDUCTIVITY AT LOW CARRIER CONCENTRATIONS IN BULK AND THIN-FILM SUPERCONDUCTING SEMICONDUCTORS [J].

EAGLES, DM .

PHYSICAL REVIEW, 1969, 186 (02) :456-&

[10] BCS to Bose crossover: Broken-symmetry state [J].

Engelbrecht, JR ;

Randeria, M ;

deMelo, CARS .

PHYSICAL REVIEW B, 1997, 55 (22) :15153-15156