Suppression of Density Fluctuations in a Quantum Degenerate Fermi Gas

Journal Article · Fri Jul 23 00:00:00 EDT 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.105.040402· OSTI ID:21410926

Sanner, Christian; Su, Edward J; Keshet, Aviv; Gommers, Ralf; Shin, Yong-il; Wujie, Huang; Ketterle, Wolfgang ^[1]

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1. MIT-Harvard Center for Ultracold Atoms, Research Laboratory of Electronics, and Department of Physics, Massachusetts Institute of Technology, Cambridge Massachusetts 02139 (United States)

We study density profiles of an ideal Fermi gas and observe Pauli suppression of density fluctuations (atom shot noise) for cold clouds deep in the quantum degenerate regime. Strong suppression is observed for probe volumes containing more than 10 000 atoms. Measuring the level of suppression provides sensitive thermometry at low temperatures. After this method of sensitive noise measurements has been validated with an ideal Fermi gas, it can now be applied to characterize phase transitions in strongly correlated many-body systems.

• OSTI ID: 21410926
• Journal Information: Physical Review Letters, Vol. 105, Issue 4; Other Information: DOI: 10.1103/PhysRevLett.105.040402; (c) 2010 The American Physical Society; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATOMS
DENSITY
FERMI GAS
FLUCTUATIONS
MANY-BODY PROBLEM
PHASE TRANSFORMATIONS
QUANTUM MECHANICS
TEMPERATURE RANGE 0065-0273 K
MECHANICS
PHYSICAL PROPERTIES
TEMPERATURE RANGE
VARIATIONS