3 citations · 5 across the 3 of their papers we have counts for
5 papers
Superconducting phase in the BCS model with imaginary magnetic field. III. Non-vanishing free dispersion relations
Yohei Kashima
We analyze a class of the BCS model, whose free dispersion relation is non-vanishing, under the influence of imaginary magnetic field at positive temperature. The magnitude of the…
Superconducting phase in the BCS model with imaginary magnetic field. II. Multi-scale infrared analysis
Yohei Kashima
We analyze the reduced BCS model with an imaginary magnetic field in a large domain of the temperature and the imaginary magnetic field. The magnitude of the attractive reduced BCS…
Superconducting phase in the BCS model with imaginary magnetic field
Yohei Kashima
We prove that in the reduced quartic BCS model with an imaginary external magnetic field a spontaneous U(1)-symmetry breaking (SSB) and an off-diagonal long range order (ODLRO) occ…
The zero-temperature limit of the free energy density in many-electron systems at half-filling
Yohei Kashima
We prove by means of a renormalization group method that in weakly interacting many-electron systems at half-filling on a periodic hyper-cubic lattice, the free energy density unif…
Characterization of subdifferentials of a singular convex functional in Sobolev spaces of order minus one
Yohei Kashima
Subdifferentials of a singular convex functional representing the surface free energy of a crystal under the roughening temperature are characterized. The energy functional is defi…