Fermi-Liquid Behavior of the Normal Phase of a Strongly Interacting Gas of Cold Atoms

Anno: 2011

Autori: Nascimbine S., Navon N., Pilati S., Chevy F., Giorgini S., Georges A., Salomon C.

Affiliazione autori: UPMC, Ecole Normale Super, CNRS, Lab Kastler Brossel, F-75231 Paris, France; Swiss Fed Inst Technol, CH-8093 Zurich, Switzerland; Univ Trent, Dipartimento Fis, I-38050 Trento, Italy; INO CNR BEC Ctr, I-38050 Trento, Italy; Ecole Polytech, CNRS, Ctr Phys Theor, F-91128 Palaiseau, France; Coll France, F-75005 Paris, France.

Abstract: We measure the magnetic susceptibility of a Fermi gas with tunable interactions in the low-temperature limit and compare it to quantum Monte Carlo calculations. Experiment and theory are in excellent agreement and fully compatible with the Landau theory of Fermi liquids. We show that these measurements shed new light on the nature of the excitations of the normal phase of a strongly interacting Fermi gas.

Giornale/Rivista: PHYSICAL REVIEW LETTERS

Volume: 106 (21)      Da Pagina: 215303-1  A: 215303-4

Maggiori informazioni: We are grateful to G. Bruun, C. Lobo, P. Massignan, S. Stringari, T. Giamarchi, and R. Combescot for insightful comments. We thank D. Jin, T. Drake, and J. Gaebler for providing us experimental data on radio-frequency spectroscopy. We acknowledge support from ESF (FerMix), ANR FABIOLA, Region Ile de France (IFRAF), ERC Ferlodim, and IUF. S. P. acknowledges support from the Swiss National Science Foundation, S. P. and A. G. from the Army Research Office with funding from the DARPA OLE program.
Parole chiavi: Electron gas; Fermi liquids; Magnetic susceptibility; Temperature
DOI: 10.1103/PhysRevLett.106.215303

Citazioni: 84
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