Heat bath in a quantum circuit
Quantum Physics
2024-05-24 v1 Mesoscale and Nanoscale Physics
Abstract
We discuss the concept and realization of a heat bath in solid state quantum systems. First we demonstrate that, unlike a true resistor, a finite one-dimensional Josephson junction array or analogously a transmission line with non-vanishing frequency spacing does not strictly qualify as a Caldeira-Leggett type dissipative environment. We then consider a set of quantum two-level systems as a bath, which can be realized as a collection of qubits. We demonstrate that only a dense and wide distribution of energies of the two-level systems can secure long Poincare recurrence times characteristic of a proper heat bath. An alternative for this bath is a collection of harmonic oscillators, for instance in form of superconducting resonators.
Cite
@article{arxiv.2310.01246,
title = {Heat bath in a quantum circuit},
author = {Jukka P. Pekola and Bayan Karimi},
journal= {arXiv preprint arXiv:2310.01246},
year = {2024}
}