Open AccessMagnetic properties of one-dimensional Fermi gases in an optical cavity
Author(s) -
Yanghe Feng,
Fan Jing-Tao,
Gang Chen,
Suotang Jia
Publication year - 2019
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.68.20181954
Subject(s) - physics , photon , fermi gamma ray space telescope , magnetic field , superradiance , atomic physics , fermi gas , condensed matter physics , phase (matter) , quantum mechanics , electron , laser
In this work we show that the superradiance of the cavity photons can give rise to a magnetic transformation for the atomic system when the quasi one-dimensional Fermi gases are coupled to an optical cavity. This magnetic transformation has a close relationship with the atomic detuning and the filling number. When the interaction between the atoms is neglected, the mean-field approximation may be used in the superradiant phase. In this approximation, we analyze the static spin structure factors of the system with different filling numbers and atomic detuning. Then we characterize the cavity photons-assisted magnetic transformation and obtain the phase diagrams which are dependent on the cavity parameters. Finally, the feasible experimental parameters of our results are also discussed.