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Helson, V.*; Zwettler, T.*; Roux, K.*; Konishi, Hideki*; Uchino, Shun; Brantut, J.-P.*
Physical Review Research (Internet), 4(3), p.033199_1 - 033199_10, 2022/09
We study a Fermi gas with strong, tunable interactions dispersively coupled to a high-finesse cavity. Upon probing the system along the cavity axis, we observe a strong optomechanical Kerr nonlinearity originating from the density response of the gas to the intracavity field. Measuring the non-linearity as a function of interaction strength, we extract the zero-frequency density response function of the Fermi gas, and find an increase by a factor of two from the Bardeen-Cooper-Schrieffer to the Bose-Einstein condensate regime. The results are in quantitative agreement with a theory based on operator-product expansion, expressing the density response in terms of universal functions of the interactions, the contact and the internal energy of the gas.
Ushigusa, Kenkichi; Seki, Masahiro; Ninomiya, Hiromasa; Norimatsu, Takayoshi*; Kamada, Yutaka; Mori, Masahiro; Okuno, Kiyoshi; Shibanuma, Kiyoshi; Inoue, Takashi; Sakamoto, Keishi; et al.
Genshiryoku Handobukku, p.906 - 1029, 2007/11
no abstracts in English
Konishi, Satoshi*; Kimura, Akihiko*; Akiba, Masato; Nakamura, Hiroo; Nagasaka, Takuya*; Muroga, Takeo*; Hasegawa, Akira*; Matsui, Hideki*
Nihon Genshiryoku Gakkai-Shi, 46(5), p.311 - 322, 2004/05
no abstracts in English
Isobe, Kanetsugu; Imaizumi, Hideki*; Hayashi, Takumi; Konishi, Satoshi; Nishi, Masataka
Fusion Science and Technology, 41(3), p.988 - 992, 2002/05
no abstracts in English
Yamai, Hideki*; Konishi, Satoshi; Hara, Masahide*; Okuno, Kenji; Yamamoto, Ichiro*
Fusion Technology, 28(3), p.1591 - 1596, 1995/10
no abstracts in English
Yamai, Hideki*; Konishi, Satoshi; Yamanishi, Toshihiko; Okuno, Kenji
Fusion Technology, 26(3), p.654 - 658, 1994/11
no abstracts in English
