Suppression of Density Fluctuations in a Quantum Degenerate Fermi Gas

Details Suppression of Density Fluctuations in a Quantum Degenerate Fermi Gas Suppression of Density Fluctuations in a Quantum Degenerate Fermi Gas

2010-05-07

arxiv.org/abs/1005.1309v3

Phys. Rev. Lett. 105, 040402 (2010)

Physics

Condensed Matter

Quantum Gases

minor edit: fixed technical problem with arxiv's processing of .eps figure

Scientific paper

10.1103/PhysRevLett.105.040402

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.

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