75 citations · 152 across the 7 of their papers we have counts for
5 papers · 1 filter
Ward identity and optical-conductivity sum rule in the d-density wave state
L. Benfatto, S. Sharapov, N. Andrenacci +1
We consider the role of the Ward identity in dealing with the transport properties of an interacting system forming a d-wave modulated charge-density wave or staggered flux phase.…
Linear response theory around a localized impurity in the pseudogap regime of an anisotropic superconductor: precursor pairing vs the d-density-wave scenario
N. Andrenacci, G. G. N. Angilella, H. Beck +1
We derive the polarizability of an electron system in (i) the superconducting phase, with d-wave symmetry, (ii) the pseudogap regime, within the precursor pairing scenario, and (ii…
Internal structure of preformed Cooper pairs
N. Andrenacci, H. Beck
In order to obtain information about the internal structure of the preformed pairs in the pseudogap state of high superconductors, we calculate the propagator of a singlet pa…
Size shrinking of composite bosons for increasing density in the BCS to Bose-Einstein crossover
N. Andrenacci, P. Pieri, G. C. Strinati
We consider a system of fermions in the continuum case at zero temperature, in the strong-coupling limit of a short-range attraction when composite bosons form as bound-fermion pai…
Density-induced BCS to Bose-Einstein crossover
N. Andrenacci, A. Perali, P. Pieri +1
We investigate the zero-temperature BCS to Bose-Einstein crossover at the mean-field level, by driving it with the attractive potential and the particle density.We emphasize specif…