Monte Carlo Simulations of an Extended Feynman-Kikuchi Model

TL;DR

This paper uses Quantum Monte Carlo simulations to explore a generalized Feynman-Kikuchi model with vacancies and interactions, revealing a phase diagram with coexisting superfluid and charge order phases.

Contribution

It introduces a generalized Feynman-Kikuchi model with vacancies and interactions, and maps its phase diagram using Quantum Monte Carlo methods.

Findings

Identification of phases with coexisting superfluidity and charge order.

Mapping of the phase diagram showing different ordered regions.

Abstract

We present Quantum Monte Carlo simulations of a generalization of the Feynman-Kikuchi model which includes the possibility of vacancies and interactions between the particles undergoing exchange. By measuring the winding number (superfluid density) and density structure factor, we determine the phase diagram, and show that it exhibits regions which possess both superfluid and charge ordering.