تقرير
Optomechanical Response of a Strongly Interacting Fermi Gas
| العنوان: | Optomechanical Response of a Strongly Interacting Fermi Gas |
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| المؤلفون: | Helson, Victor, Zwettler, Timo, Roux, Kevin, Konishi, Hideki, Uchino, Shun, Brantut, Jean-Philippe |
| سنة النشر: | 2021 |
| المجموعة: | Condensed Matter Physics (Other) Quantum Physics |
| مصطلحات موضوعية: | Condensed Matter - Quantum Gases, Physics - Atomic Physics, Quantum Physics |
| الوصف: | 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 and measure it as a function of interaction strength. We find that the zero-frequency density response function of the Fermi gas increases 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. This provides an example of a driven-dissipative, strongly correlated system with a strong nonlinear response, opening up perspectives for the sensing of weak perturbations or inducing long-range interactions in Fermi gases. Comment: 11 pages, 7 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevResearch.4.033199 |
| الوصول الحر: | http://arxiv.org/abs/2111.02931Test |
| رقم الانضمام: | edsarx.2111.02931 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevResearch.4.033199 |
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