Noise thermometry with two weakly coupled Bose-Einstein condensates

被引：144

作者：

Gati, R ^{[1
]}

Hemmerling, B ^{[1
]}

Fölling, J ^{[1
]}

Albiez, M ^{[1
]}

Oberthaler, MK ^{[1
]}

机构：

[1] Heidelberg Univ, Kirchhoff Inst Phys, D-69120 Heidelberg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.96.130404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Here we report on the experimental investigation of thermally induced fluctuations of the relative phase between two Bose-Einstein condensates which are coupled via tunneling. The experimental control over the coupling strength and the temperature of the thermal background allows for the quantitative analysis of the phase fluctuations. Furthermore, we demonstrate the application of these measurements for thermometry in a regime where standard methods fail. With this we confirm that the heat capacity of an ideal Bose gas deviates from that of a classical gas as predicted by the third law of thermodynamics.

引用

页数：4

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