Quantum Joule-Thomson Effect in a Saturated Homogeneous Bose Gas

被引：38

作者：

Schmidutz, Tobias F. ^{[1
]}

Gotlibovych, Igor ^{[1
]}

Gaunt, Alexander L. ^{[1
]}

Smith, Robert P. ^{[1
]}

Navon, Nir ^{[1
]}

Hadzibabic, Zoran ^{[1
]}

机构：

[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 112卷 / 04期

基金：

英国工程与自然科学研究理事会;

关键词：

EINSTEIN CONDENSATION; FERMI GAS; ULTRACOLD GASES; THERMODYNAMICS;

D O I：

10.1103/PhysRevLett.112.040403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the thermodynamics of Bose-Einstein condensation in a weakly interacting quasihomogeneous atomic gas, prepared in an optical-box trap. We characterize the critical point for condensation and observe saturation of the thermal component in a partially condensed cloud, in agreement with Einstein's textbook picture of a purely statistical phase transition. Finally, we observe the quantum Joule-Thomson effect, namely isoenthalpic cooling of an (essentially) ideal gas. In our experiments this cooling occurs spontaneously, due to energy-independent collisions with the background gas in the vacuum chamber. We extract a Joule-Thomson coefficient mu(JT) > 10(9) K/bar, about 10 orders of magnitude larger than observed in classical gases.

引用

页数：5

共 50 条

[1] Joule-Thomson effect and quantum statistics
Kothari, DS
Srivasava, BN
NATURE, 1937, 140 : 970 - 971
[2] On the Joule-Thomson effect
Bevan, PV
PROCEEDINGS OF THE CAMBRIDGE PHILOSOPHICAL SOCIETY, 1904, 12 : 127 - 134
[3] GAS-SOLID JOULE-THOMSON EFFECT
PIEROTTI, RA
RYBOLT, TR
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 1979, (APR): : 33 - 33
[4] THE GAS-SOLID JOULE-THOMSON EFFECT
PIEROTTI, RA
RYBOLT, TR
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 1983, 185 (MAR): : 39 - COLL
[5] THE JOULE-THOMSON EFFECT IN GAS-SOLID DISPERSIONS
RYBOLT, TR
PIEROTTI, RA
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 1981, 181 (MAR): : 7 - COLL
[6] THE JOULE-THOMSON EFFECT IN ETHYLENE
DEGROOT, SR
GELDERMANS, M
PHYSICA, 1947, 13 (09): : 538 - 542
[7] ON THE INTEGRAL JOULE-THOMSON EFFECT
MAYTAL, BZ
SHAVIT, A
CRYOGENICS, 1994, 34 (01) : 19 - 23
[8] The Joule-Thomson effect in argon
Roebuck, JR
Osterberg, H
PHYSICAL REVIEW, 1934, 46 (09): : 0785 - 0790
[9] The Joule-Thomson effect for air
Keyes, PG
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1921, 43 : 1452 - 1470
[10] The Joule-Thomson effect for helium
Perry, JH
JOURNAL OF PHYSICAL CHEMISTRY, 1924, 28 : 1108 - 1112

← 1 2 3 4 5 →