An explanation for the pseudogap of high-temperature superconductors based on quantum optics

TL;DR

This paper explains the pseudogap phenomenon in high-temperature superconductors using quantum optics, introducing a damping factor for quasiparticles that naturally produces the superconducting dome and relates to empirical scaling laws.

Contribution

It presents a novel quantum optics-based approach that derives a universal phase transition equation and connects pseudogap behavior to quasiparticle damping without microscopic pairing assumptions.

Findings

Superconducting dome emerges from damping-based quasiparticle lifetime.

Pseudogap is linked to pairing with damped coherence.

Derived equations match empirical scaling laws.

Abstract

We first explain the pseudogap of high-temperature superconductivity based on an approach of quantum optics. After introducing a damping factor for the lifetime $\tau$ of quasiparticles, the superconducting dome is naturally produced, and the pseudogap is the consequence of pairing with damped coherence. We derive a new expression of Ginzburg-Landau free energy density, in which a six-order term due to decoherence damping effect is included. Without invoking any microscopic pairing mechanism, this approach provides a simple universal equation of second-order phase transition, which can be reduced to two well-known empirical scaling equations: the superconducting dome Presland-Tallon equation, and the normal-state pseudogap crossover temperature $T^{*}$ line.