Published August 2010
| Version v1
Journal article
Variational study of a two-level system coupled to a harmonic oscillator in an ultrastrong-coupling regime
Creators
- 1. Department of Physics, Pohang University of Science and Technology, Pohang 790-784 (Korea, Republic of)
- 2. Department of Physics, Korea University, Seoul 136-713 (Korea, Republic of)
Description
The nonclassical behavior 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 solutions do not account accurately for nonclassical effects such as squeezing. We suggest a trial wave function and demonstrate that it has an excellent accuracy for the quantum correlation effects as well as for the energy.
Additional details
Identifiers
- DOI
- 10.1103/PhysRevA.82.025802;
- arXiv
- arXiv:1006.1989v2;
Publishing Information
- Journal Title
- Physical Review. A
- Journal Volume
- 82
- Journal Issue
- 2
- Journal Page Range
- p. 025802-025802.4
- ISSN
- 1050-2947
- CODEN
- PLRAAN
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 42043394
- Subject category
- S74: ATOMIC AND MOLECULAR PHYSICS; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- ACCURACY; CORRELATIONS; COUPLING; ENERGY LEVELS; HARMONIC OSCILLATORS; MATHEMATICAL SOLUTIONS; VARIATIONAL METHODS; WAVE FUNCTIONS
- Descriptors DEC
- CALCULATION METHODS; FUNCTIONS
Optional Information
- Notes
- (c) 2010 The American Physical Society