Establishing Gauge Invariant Linear Response of Fermionic Superuids with Pair Fluctuations Yan he贺言 Sichuan University四川大学
Establishing Gauge Invariant Linear Response of Fermionic Superuids with Pair Fluctuations Yan He 贺言 Sichuan University 四川大学
Collaborators Chih-Chun Chien简志钧 UC Merced Hao guo郭吴, Southest u东南大学 This talk is based on the following papers H Guo, C.C.Chien, YH, J. Low Temp. Phys. 172, 5(2013) H Guo, C.C. Chien, YH, K Levin, Int J. Mod. Phys. B, 27, 1330010(2013) YH. H. Guo. arXiv 1505: 04080
Collaborators ◼ Chih-Chun Chien 简志钧 UC Merced ◼ Hao Guo 郭昊，Southest U东南大学 This talk is based on the following papers H. Guo, C.C.Chien, YH, J. Low Temp. Phys. 172, 5 (2013) H. Guo, C.C.Chien, YH, K. Levin, Int. J. Mod. Phys. B,27,1330010 (2013) YH, H. Guo, arXiv: 1505:04080
Outline BCS-BEC crossover theory and pair fluctuation theory a Gauge invariant linear response in bCs mean field theory: Consistent Fluctuation of Order parameter (CFOP a diagrammatic derivation of CFOP Gauge invariant linear response with pair fluctuation Summary
Outline ◼ BCS-BEC crossover theory and pair fluctuation theory ◼ Gauge invariant linear response in BCS mean field theory: Consistent Fluctuation of Order parameter (CFOP) ◼ A diagrammatic derivation of CFOP ◼ Gauge invariant linear response with pair fluctuation ◼ Summary
a brief introduction to bcs-beC crossover and pair fluctuation
A brief introduction to BCS-BEC crossover and pair fluctuation
Tunable attractive interaction via Feshbach resonance Feshbach resonance involves a bound state near a continuum level Unitary limit BEC Contact potential intermediate nteraction is described BCS by scattering length 60 100 magnetic field (mT) ← ncreasing attraction
Tunable attractive interaction via Feshbach resonance Increasing attraction k -k Feshbach resonance involves a bound state near a continuum level. Contact potential. Interaction is described by scattering length. R Unitary limit