Variational study of a two-level system coupled to a harmonic oscillator in a ultrastrong coupling regime
Mesoscale and Nanoscale Physics
2010-09-01 v2
Abstract
The nonclassical behaviors of a two-level system coupled to a harmonic oscillator is investigated in the ultrastrong coupling regime. We revisit the variational solution of the ground state and find that the existing solution do not account accurately for nonclassical effects such squeezing. We suggest a new trial wave function and demonstrate that it has an excellent accuracy on the quantum correlation effects as well as on energy.
Keywords
Cite
@article{arxiv.1006.1989,
title = {Variational study of a two-level system coupled to a harmonic oscillator in a ultrastrong coupling regime},
author = {Myung-Joong Hwang and Mahn-Soo Choi},
journal= {arXiv preprint arXiv:1006.1989},
year = {2010}
}
Comments
4 pages; 3 figures; to appear in Phys. Rev. A