Super-Tonks-Girardeau Gas of Spin-1/2 Interacting Fermions

Journal Article · Fri Oct 22 04:00:00 EDT 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.105.175301· OSTI ID:21467044

Liming, Guan; Shu, Chen ^[1]

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1. Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China)

Fermi gases confined in tight one-dimensional waveguides form two-particle bound states of atoms in the presence of a strongly attractive interaction. Based on the exact solution of the one-dimensional spin-1/2 interacting Fermi gas, we demonstrate that a stable excited state with no pairing between attractive fermionic atoms can be realized by a sudden switch of interaction from the strongly repulsive regime to strongly attractive regime. Such a state is an exact fermionic analog of the experimentally observed super-Tonks-Girardeau state of bosonic Cesium atoms [Science 325, 1224 (2009)] and should be possible to be observed by the experiment. The frequency of the lowest breathing mode of the fermionic super-Tonks-Girardeau gas is calculated as a function of the interaction strength, which could be used as a detectable signature for the experimental observation.

• OSTI ID: 21467044
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 17 Vol. 105; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
ANGULAR MOMENTUM
ATOMS
BOUND STATE
CESIUM
ELEMENTS
ENERGY LEVELS
EXACT SOLUTIONS
FERMI GAS
FERMIONS
INTERACTIONS
MATHEMATICAL SOLUTIONS
METALS
ONE-DIMENSIONAL CALCULATIONS
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
SPIN
WAVEGUIDES