222 citations · 1.7k across the 67 of their papers we have counts for
5 papers · 1 filter
BCS thermal vacuum of fermionic superfluids and its perturbation theory
Xu-Yang Hou, Ziwen Huang, Hao Guo +2
The thermal field theory is applied to fermionic superfluids by doubling the degrees of freedom of the BCS theory. We construct the two-mode states and the corresponding Bogoliubov…
Theories of Linear Response in BCS Superfluids and How They Meet Fundamental Constraints
Hao Guo, Chih-Chun Chien, Yan He
We address the importance of symmetry and symmetry breaking on linear response theories of fermionic BCS superfluids. The linear theory of a noninteracting Fermi gas is reviewed an…
The Two Component Optical Conductivity in the Cuprates: A Necessary Consequence of Preformed Pairs
Dan Wulin, Hao Guo, Chih-Chun Chien +1
We address how the finite frequency real conductivity in the underdoped cuprates is affected by the pseudogap, contrasting the behavior above and below . The f-sum rule…
Conductivity in Pseudogapped Superconductors: The Role of the Fermi Arcs
Dan Wulin, Benjamin M. Fregoso, Hao Guo +2
We calculate the dc conductivity in a pseudogapped high superconductor within a theory which is consistent with gauge invariance. Our results contain additional terms bey…
Perfect Fluids and Bad Metals: Transport Analogies Between Ultracold Fermi Gases and High Superconductors
Hao Guo, Dan Wulin, Chih-Chun Chien +1
In this paper, we examine in a unified fashion dissipative transport in strongly correlated systems. We thereby demonstrate the connection between "bad metals" (such as the high te…