Finite-Temperature Scaling of Magnetic Susceptibility and Geometric Phase in the XY Spin Chain

TL;DR

This paper investigates the finite-temperature scaling of magnetic susceptibility in the 1D quantum XY model, demonstrating universal critical behavior and its relation to geometric phases, with implications for experimental testing.

Contribution

It reveals the finite-temperature scaling behavior of magnetic susceptibility and its universality in the quantum XY model, linking it to geometric phases and quantum phase transitions.

Findings

Magnetic susceptibility exhibits finite-temperature scaling near zero temperature.

Universal critical properties are verified in the quantum XY model.

A close relation between magnetic susceptibility and geometric phase is established.

Abstract

We study the magnetic susceptibility of 1D quantum XY model, and show that when the temperature approaches zero, the magnetic susceptibility exhibits the finite-temperature scaling behavior. This scaling behavior of the magnetic susceptibility in 1D quantum XY model, due to the quantum-classical mapping, can be easily experimentally tested. Furthermore, the universality in the critical properties of the magnetic susceptibility in quantum XY model is verified. Our study also reveals the close relation between the magnetic susceptibility and the geometric phase in some spin systems, where the quantum phase transitions are driven by an external magnetic field.