Quartetting in Nuclear Matter

TL;DR

This paper develops a comprehensive theory for quartet condensation in nuclear matter, evaluating critical temperatures and introducing a nonlinear approach that highlights fundamental differences from pairing phenomena.

Contribution

It presents a novel nonlinear theory for quartet condensation in nuclear matter, extending Gorkov's approach from pairing to quartets, and evaluates critical temperatures for different nuclear matter types.

Findings

Critical temperatures for symmetric and asymmetric nuclear matter are calculated.

A fully nonlinear quartet order parameter theory is formulated and solved.

Significant qualitative differences from pairing are identified.

Abstract

A general theory for the condensation of strongly bound quartets in infinite nuclear matter is presented. Critical temperatures for symmetric and asymmetric nuclear matter are evaluated. A fully nonlinear theory for the quartet order parameter, based on an analogy of the Gorkov approach to pairing, is presented and solved. The strong qualitative difference with pairing is pointed out.