期刊
PHYSICAL REVIEW LETTERS
卷 108, 期 24, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.240404
关键词
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资金
- NSF
- ONR
- AFOSR MURI
- ARO [W911NF-07-1-0493]
- DARPA Optical Lattice Emulator program
- Direct For Mathematical & Physical Scien
- Division Of Physics [0969731] Funding Source: National Science Foundation
A degenerate Fermi gas is rapidly quenched into the regime of strong effective repulsion near a Feshbach resonance. The spin fluctuations are monitored using speckle imaging and, contrary to several theoretical predictions, the samples remain in the paramagnetic phase for an arbitrarily large scattering length. Over a wide range of interaction strengths a rapid decay into bound pairs is observed over times on the order of 10 (h) over bar /E-F, preventing the study of equilibrium phases of strongly repulsive fermions. Our work suggests that a Fermi gas with strong short-range repulsive interactions does not undergo a ferromagnetic phase transition.
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