Modern trends in Superconductivity and Superfluidity. Chapters 11, 13

TL;DR

This paper reviews recent developments in superconductivity and superfluidity, focusing on Fermi-gas approaches for superfluidity in helium systems and spin-charge phenomena in ladder models and high-Tc superconductors.

Contribution

It introduces new theoretical insights into superfluidity in helium mixtures and explores spin-charge separation in complex ladder systems and high-temperature superconductors.

Findings

Fermi-gas approach identifies conditions for superfluidity in helium-3 systems.

Analysis of spin-charge separation in ladder models reveals confinement mechanisms.

Insights into anisotropic and isotropic t-J models enhance understanding of high-Tc superconductivity.

Abstract

In Chapter 11 we present Fermi-gas approach for the search of s-wave and p-wave superfluidity in three-dimensional solutions of He-3 in He-4 and in He-3 submonolayers. In Chapter 13 on the basis of the anisotropic and isotropic t-J models we study spin-charge separation and confinement in ladder systems and in high-Tc superconductors.