TY - JOUR
T1 - Photoemission spectrum in the BCS-BEC crossover regime of a rare-earth fermi gas with an orbital feshbach resonance
AU - Mondal, Soumita
AU - Inotani, Daisuke
AU - Ohashi, Yoji
N1 - Funding Information:
Acknowledgments SM thanks M. Ota and D. Kagamihara for useful discussions. Y.O. thanks Y. Takahashi for discussions about the current experimental situation of 173Yb Fermi gas. This work was supported by KiPAS project in Keio University. SM thanks Japan International Co-operation Agency (JICA) and Keio Leading-edge Laboratory of Science and Technology (KLL) at Keio University for supporting this research. D.I. was supported by Grant-in-Aid for Scientific Research from JSPS in Japan (No. JP16K17773). Y.O. was supported by Grant-in-Aid for Scientific Research from JSPS in Japan (Nos. JP15H00840, JP15K00178, and JP16K05503).
Funding Information:
SM thanks M. Ota and D. Kagamihara for useful discussions. Y.O. thanks Y. Takahashi for discussions about the current experimental situation of 173Yb Fermi gas. This work was supported by KiPAS project in Keio University. SM thanks Japan International Co-operation Agency (JICA) and Keio Leading-edge Laboratory of Science and Technology (KLL) at Keio University for supporting this research. D.I. was supported by Grant-in-Aid for Scientific Research from JSPS in Japan (No. JP16K17773). Y.O. was supported by Grant-in-Aid for Scientific Research from JSPS in Japan (Nos. JP15H00840, JP15K00178, and JP16K05503).
Publisher Copyright:
© 2018 The Physical Society of Japan.
PY - 2018
Y1 - 2018
N2 - We theoretically investigate photoemission spectrum (PES) in a 173Yb Fermi gas with a tunable pairing interaction associated with an orbital Feshbach resonance. Including the two-channel character of this rare-earth atomic system, we examine strong-coupling effects on single-particle properties of the open and closed channels, within the framework of an T-matrix approximation in terms of fluctuations in the Cooper channel. In the BCS-BEC crossover region, PES in the closed channel is shown to exhibit non-vanishing intensity in the negative energy region, as an effect of pairing fluctuations. On the other hand, PES in the open channel exhibits a pseudogap phenomenon, as in the case of a broad magnetic Feshbach resonance discussed in 40K and 6Li Fermi gases. We also examine effects of a harmonic trap in the local density approximation, to see how the spatial inhomogeneity affects strong-coupling corrections to PES.
AB - We theoretically investigate photoemission spectrum (PES) in a 173Yb Fermi gas with a tunable pairing interaction associated with an orbital Feshbach resonance. Including the two-channel character of this rare-earth atomic system, we examine strong-coupling effects on single-particle properties of the open and closed channels, within the framework of an T-matrix approximation in terms of fluctuations in the Cooper channel. In the BCS-BEC crossover region, PES in the closed channel is shown to exhibit non-vanishing intensity in the negative energy region, as an effect of pairing fluctuations. On the other hand, PES in the open channel exhibits a pseudogap phenomenon, as in the case of a broad magnetic Feshbach resonance discussed in 40K and 6Li Fermi gases. We also examine effects of a harmonic trap in the local density approximation, to see how the spatial inhomogeneity affects strong-coupling corrections to PES.
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U2 - 10.7566/JPSJ.87.094301
DO - 10.7566/JPSJ.87.094301
M3 - Article
AN - SCOPUS:85053666796
SN - 0031-9015
VL - 87
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 9
M1 - 094301
ER -