Coherent mesoscopic quantum tunneling in boson-fermion mixtures

被引：5

作者：

Mozyrsky, D. ^{[1
]}

Martin, I. ^{[1
]}

Timmermans, E. ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA

来源：

PHYSICAL REVIEW A | 2007年 / 76卷 / 05期

关键词：

D O I：

10.1103/PhysRevA.76.051601

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We show that cold atom systems of simultaneously trapped Bose-Einstein condensates (BECs) and quantum degenerate fermionic atoms provide promising laboratories for the study of macroscopic quantum tunneling. Our theoretical studies reveal that the spatial extent of a small trapped BEC immersed in a Fermi sea can tunnel and coherently oscillate between the values of the separated and mixed configurations (the phases of the phase separation transition of BEC-fermion systems). We evaluate the period, amplitude, and dissipation rate for Na-23 and K-40 atoms, and we discuss the experimental prospects for observing this phenomenon.

引用

页数：4

共 28 条

[1] Coherent quasiclassical dynamics of a persistent current qubit [J].

Berns, D. M. ;

Oliver, W. D. ;

Valenzuela, S. O. ;

Shytov, A. V. ;

Berggren, K. K. ;

Levitov, L. S. ;

Orlando, T. P. .

PHYSICAL REVIEW LETTERS, 2006, 97 (15)

[2] Experimental study of the BEC-BCS crossover region in lithium 6 [J].

Bourdel, T ;

Khaykovich, L ;

Cubizolles, J ;

Zhang, J ;

Chevy, F ;

Teichmann, M ;

Tarruell, L ;

Kokkelmans, SJJMF ;

Salomon, C .

PHYSICAL REVIEW LETTERS, 2004, 93 (05) :050401-1

[3] Atom counting in ultracold gases using photoionization and ion detection [J].

Campey, T. ;

Vale, C. J. ;

Davis, M. J. ;

Heckenberg, N. R. ;

Rubinsztein-Dunlop, H. ;

Kraft, S. ;

Zimmermann, C. ;

Fortagh, J. .

PHYSICAL REVIEW A, 2006, 74 (04)

[4] Quantum superposition states of Bose-Einstein condensates [J].

Cirac, JI ;

Lewenstein, M ;

Molmer, K ;

Zoller, P .

PHYSICAL REVIEW A, 1998, 57 (02) :1208-1218

[5] MEASUREMENTS OF MACROSCOPIC QUANTUM TUNNELING OUT OF THE ZERO-VOLTAGE STATE OF A CURRENT-BIASED JOSEPHSON JUNCTION [J].

DEVORET, MH ;

MARTINIS, JM ;

CLARKE, J .

PHYSICAL REVIEW LETTERS, 1985, 55 (18) :1908-1911

[6] Dynamics of collapsing and exploding Bose-Einstein condensates [J].

Donley, EA ;

Claussen, NR ;

Cornish, SL ;

Roberts, JL ;

Cornell, EA ;

Wieman, CE .

NATURE, 2001, 412 (6844) :295-299

[7] Collapse of a Bose condensate with attractive interactions [J].

Freire, JA ;

Arovas, DP .

PHYSICAL REVIEW A, 1999, 59 (02) :1461-1467

[8] Single atoms in an optical dipole trap: Towards a deterministic source of cold atoms [J].

Frese, D ;

Ueberholz, B ;

Kuhr, S ;

Alt, W ;

Schrader, D ;

Gomer, V ;

Meschede, D .

PHYSICAL REVIEW LETTERS, 2000, 85 (18) :3777-3780

[9] Quantum superposition of distinct macroscopic states [J].

Friedman, JR ;

Patel, V ;

Chen, W ;

Tolpygo, SK ;

Lukens, JE .

NATURE, 2000, 406 (6791) :43-46

[10] Direct observation of growth and collapse of a Bose-Einstein condensate with attractive interactions [J].

Gerton, JM ;

Strekalov, D ;

Prodan, I ;

Hulet, RG .

NATURE, 2000, 408 (6813) :692-695

← 1 2 3 →