In Situ Imaging of the Thermal de Broglie Wavelength in an Ultracold Bose Gas

被引：0

作者：

Xiang, Jinggang ^{[1
,2
,3
]}

Cruz-Colon, Enid

Chua, Candice C. ^{[2
,3
,4
]}

Milner, William R. ^{[1
,2
,3
]}

de Hond, Julius ^{[1
,2
,3
]}

Fricke, Jacob F. ^{[1
,2
,3
]}

Ketterle, Wolfgang ^{[1
,2
,3
,5
,6
,7
]}

机构：

[1] MIT, Dept Phys, Cambridge, MA 02139 USA

[2] MIT, Res Lab Elect, Cambridge, MA 02139 USA

[3] MIT, Harvard Ctr Ultracold Atoms, Cambridge, MA 02139 USA

[4] Harvard Univ, Dept Chem & Chem Biol, Cambridge, MA 02138 USA

[5] Pasqal SAS, Fred Roeskestr 100, Amsterdam, Netherlands

[6] Swiss Fed Inst Technol, Inst Quantum Elect, CH-8093 Zurich, Switzerland

[7] Swiss Fed Inst Technol, Quantum Ctr, CH-8093 Zurich, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 2025年 / 134卷 / 18期

关键词：

HANBURY-BROWN; EINSTEIN CONDENSATION; TWISS CORRELATIONS; FLUCTUATIONS; NUMBER; STATES; IDEAL;

D O I：

10.1103/PhysRevLett.134.183401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the first direct in situ observation of density fluctuations on the scale of the thermal de Broglie wavelength in an ultracold gas of bosons. Bunching of 87Rb atoms in a quasi-two-dimensional system is observed by single-atom imaging using a quantum gas microscope. Compared to a classical ensemble, we observe a 30% enhancement of the second-order correlation function. We show the spatial and thermal dependence of these correlations. The reported method of detecting in situ correlations can be applied to interacting many-body systems and to the study of critical phenomena near phase transitions.

引用

页数：6

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