Thermodynamics of Finite Quantum Systems: Application to Spin Magnetism II
S. Sitotaw, R.A. Serota (University of Cincinnati)
TL;DR
This paper explores the thermodynamics of finite quantum systems, specifically spin magnetism, at low temperatures, analyzing susceptibility, heat capacity, and Knight shift distributions for different level statistics.
Contribution
It extends previous work to lower temperatures and provides new distribution functions and comparisons for spin susceptibility, heat capacity, and Knight shift in quantum systems.
Findings
Distribution functions for spin susceptibility and heat capacity are derived for Poisson and Wigner-Dyson statistics.
The line shape of the Knight shift due to spin effects is characterized for single particles and ensembles.
Comparison of spin and orbital contributions to the Knight shift is presented.
Abstract
We extend our study of thermodynamics of a Kubo particle to temperatures smaller than the interlevel spacing. We obtain the distribution functions of spin susceptibility and heat capacity for Poisson and Wigner-Dyson level statistics. We evaluate the line shape of the Knight shift due to spin effects both in a single particle and for the ensemble average and compare it with orbital and spin-orbit contributions.
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