TY - JOUR
T1 - Single-Particle Structures in the Normal State of a Strongly Interacting Bose–Fermi Mixture with Mass Imbalance
AU - Manabe, K.
AU - Kagamihara, D.
AU - Inotani, D.
AU - Ohashi, Y.
N1 - Funding Information:
Acknowledgements We would like to thank R. Sato for discussions. This work was supported by KiPAS project in Keio University. DI was supported by Grant-in-aid for Scientific Research from JSPS in Japan (No. JP16K17773). YO was supported by Grant-in-aid for Scientific Research from MEXT and JSPS in Japan (Nos. JP16K05503, JP18K11345, JP18H05406).
Funding Information:
We would like to thank R. Sato for discussions. This work was supported by KiPAS project in Keio University. DI was supported by Grant-in-aid for Scientific Research from JSPS in Japan (No. JP16K17773). YO was supported by Grant-in-aid for Scientific Research from MEXT and JSPS in Japan (Nos. JP16K05503, JP18K11345, JP18H05406).
Publisher Copyright:
© 2018, Springer Science+Business Media, LLC, part of Springer Nature.
PY - 2019/7/15
Y1 - 2019/7/15
N2 - We extend some of the authors’ previous work for a mass-balanced Bose–Fermi mixture to include effects of realistic mass imbalance in a 23Na–40K and a 87Rb–40K mixtures. Including effects of pairing fluctuations within the framework of an improved T-matrix theory, we calculate the single-particle spectral weight (SW), as well as the photoemission spectrum (PES) in the unitary regime at the Bose–Einstein condensation temperature TBEC. We show that the characteristic three-peak structure induced by paring fluctuations, being predicted in the mass-balanced case, remains to exist in SW even in the presence of mass difference. We also show that PES is a useful experimental method to observe this phenomenon in a 23Na–40K, as well as 87Rb–40K, Bose–Fermi mixtures. Since this strong-coupling phenomenon is qualitatively different from that in a two-component Fermi gas, our results would be useful in clarifying how the quantum statistics affects Bose and Fermi pairing phenomena in a two-component gas mixture.
AB - We extend some of the authors’ previous work for a mass-balanced Bose–Fermi mixture to include effects of realistic mass imbalance in a 23Na–40K and a 87Rb–40K mixtures. Including effects of pairing fluctuations within the framework of an improved T-matrix theory, we calculate the single-particle spectral weight (SW), as well as the photoemission spectrum (PES) in the unitary regime at the Bose–Einstein condensation temperature TBEC. We show that the characteristic three-peak structure induced by paring fluctuations, being predicted in the mass-balanced case, remains to exist in SW even in the presence of mass difference. We also show that PES is a useful experimental method to observe this phenomenon in a 23Na–40K, as well as 87Rb–40K, Bose–Fermi mixtures. Since this strong-coupling phenomenon is qualitatively different from that in a two-component Fermi gas, our results would be useful in clarifying how the quantum statistics affects Bose and Fermi pairing phenomena in a two-component gas mixture.
KW - Bose–Einstein condensation
KW - Bose–Fermi mixture
KW - Cold atom physics
KW - Strong-coupling effects
UR - http://www.scopus.com/inward/record.url?scp=85058630368&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85058630368&partnerID=8YFLogxK
U2 - 10.1007/s10909-018-02114-1
DO - 10.1007/s10909-018-02114-1
M3 - Article
AN - SCOPUS:85058630368
SN - 0022-2291
VL - 196
SP - 126
EP - 132
JO - Journal of Low Temperature Physics
JF - Journal of Low Temperature Physics
IS - 1-2
ER -