Local Observation of Antibunching in a Trapped Fermi Gas

被引：81

作者：

Mueller, Torben ^{[1
]}

Zimmermann, Bruno ^{[1
]}

Meineke, Jakob ^{[1
]}

Brantut, Jean-Philippe ^{[1
]}

Esslinger, Tilman ^{[1
]}

Moritz, Henning ^{[1
,2
]}

机构：

[1] ETH, Inst Quantum Elect, CH-8093 Zurich, Switzerland

[2] Univ Hamburg, Inst Laser Phys, D-22761 Hamburg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 04期

关键词：

HANBURY-BROWN; INTERFEROMETRY;

D O I：

10.1103/PhysRevLett.105.040401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Local density fluctuations and density profiles of a Fermi gas are measured in situ and analyzed. In the quantum degenerate regime, the weakly interacting Li-6 gas shows a suppression of the density fluctuations compared to the nondegenerate case, where atomic shot noise is observed. This manifestation of antibunching is a direct result of the Pauli principle and constitutes a local probe of quantum degeneracy. We analyze our data using the predictions of the fluctuation-dissipation theorem and the local density approximation, demonstrating a fluctuation-based temperature measurement.

引用

页数：4

共 25 条

[1] Probing many-body states of ultracold atoms via noise correlations [J].

Altman, E ;

Demler, E ;

Lukin, MD .

PHYSICAL REVIEW A, 2004, 70 (01) :013603-1

[2] Photon counting strategies with low-light-level CCDs [J].

Basden, AG ;

Haniff, CA ;

Mackay, CD .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2003, 345 (03) :985-991

[3]

Baym G, 1998, ACTA PHYS POL B, V29, P1839

[4] Density correlations in ultracold atomic Fermi gases [J].

Belzig, W. ;

Schroll, C. ;

Bruder, C. .

PHYSICAL REVIEW A, 2007, 75 (06)

[5] Squeezing and entanglement in a Bose-Einstein condensate [J].

Esteve, J. ;

Gross, C. ;

Weller, A. ;

Giovanazzi, S. ;

Oberthaler, M. K. .

NATURE, 2008, 455 (7217) :1216-1219

[6] Observations of density fluctuations in an elongated bose gas: Ideal gas and quasicondensate regimes [J].

Esteve, J ;

Trebbia, JB ;

Schumm, T ;

Aspect, A ;

Westbrook, CI ;

Bouchoule, I .

PHYSICAL REVIEW LETTERS, 2006, 96 (13)

[7] Spatial quantum noise interferometry in expanding ultracold atom clouds [J].

Fölling, S ;

Gerbier, F ;

Widera, A ;

Mandel, O ;

Gericke, T ;

Bloch, I .

NATURE, 2005, 434 (7032) :481-484

[8] Noise thermometry with two weakly coupled Bose-Einstein condensates [J].

Gati, R ;

Hemmerling, B ;

Fölling, J ;

Albiez, M ;

Oberthaler, MK .

PHYSICAL REVIEW LETTERS, 2006, 96 (13)

[9] In situ observation of incompressible Mott-insulating domains in ultracold atomic gases [J].

Gemelke, Nathan ;

Zhang, Xibo ;

Hung, Chen-Lung ;

Chin, Cheng .

NATURE, 2009, 460 (7258) :995-U75

[10] Transport of Bose-Einstein condensates with optical tweezers -: art. no. 020401 [J].

Gustavson, TL ;

Chikkatur, AP ;

Leanhardt, AE ;

Görlitz, A ;

Gupta, S ;

Pritchard, DE ;

Ketterle, W .

PHYSICAL REVIEW LETTERS, 2002, 88 (02) :4

← 1 2 3 →