TY - JOUR
T1 - Specific heat and effects of uniaxial anisotropy of a p-wave pairing interaction in a strongly interacting ultracold fermi gas
AU - Inotani, Daisuke
AU - Wyk, Pieter Van
AU - Ohashi, Yoji
N1 - Funding Information:
YO thanks T. Mukaiyama for useful discussions on the stability of a p-wave interacting Fermi gas. This work was supported by KiPAS project in Keio University. DI was supported by a Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (No. JP16K17773). YO was supported by Grants-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology and the Japan Society for the Promotion of Science (Nos. JP15H00840, JP15K00178, and JP16K05503).
Publisher Copyright:
© 2017 The Physical Society of Japan.
PY - 2017/4/15
Y1 - 2017/4/15
N2 - We investigate the specific heat CVat constant volume and effects of uniaxial anisotropy of a p-wave attractive interaction in the normal state of an ultracold Fermi gas. Within the framework of the strong-coupling theory developed by Nozières and Schmitt-Rink, we evaluate this thermodynamic quantity as a function of temperature, in the whole interaction regime. While the uniaxial anisotropy is not crucial for CVin the weak-coupling regime, CVis found to be sensitive to the uniaxial anisotropy in the strong-coupling regime. This originates from the population imbalance among pi-wave molecules (i = x; y; z), indicating that the specific heat is a useful observable to see which kinds of p-wave molecules dominantly exist in the strong-coupling regime when the p-wave interaction has uniaxial anisotropy. Using this strong point, we classify the strong-coupling regime into some characteristic regions. Since a p-wave pairing interaction with uniaxial anisotropy has been discovered in a 40K Fermi gas, our results would be useful in considering strong-coupling properties of a p-wave interacting Fermi gas, when the interaction is uniaxially anisotropic.
AB - We investigate the specific heat CVat constant volume and effects of uniaxial anisotropy of a p-wave attractive interaction in the normal state of an ultracold Fermi gas. Within the framework of the strong-coupling theory developed by Nozières and Schmitt-Rink, we evaluate this thermodynamic quantity as a function of temperature, in the whole interaction regime. While the uniaxial anisotropy is not crucial for CVin the weak-coupling regime, CVis found to be sensitive to the uniaxial anisotropy in the strong-coupling regime. This originates from the population imbalance among pi-wave molecules (i = x; y; z), indicating that the specific heat is a useful observable to see which kinds of p-wave molecules dominantly exist in the strong-coupling regime when the p-wave interaction has uniaxial anisotropy. Using this strong point, we classify the strong-coupling regime into some characteristic regions. Since a p-wave pairing interaction with uniaxial anisotropy has been discovered in a 40K Fermi gas, our results would be useful in considering strong-coupling properties of a p-wave interacting Fermi gas, when the interaction is uniaxially anisotropic.
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U2 - 10.7566/JPSJ.86.044301
DO - 10.7566/JPSJ.86.044301
M3 - Article
AN - SCOPUS:85017421002
VL - 86
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 4
M1 - 044301
ER -