Entanglement of atoms induced by thermal noise in the presence of initial atomic coherence
| Autor: | Evgeny K. Bashkirov |
|---|---|
| Jazyk: | English<br />Russian |
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Физика волновых процессов и радиотехнические системы, Vol 23, Iss 3, Pp 10-17 (2020) |
| Druh dokumentu: | article |
| ISSN: | 1810-3189 2782-294X |
| DOI: | 10.18469/1810-3189.2020.23.3.10-17 |
| Popis: | In this article, author investigated the dynamics of entanglement of two dipole-coupled natural or artificial two-level atoms (qubits) interacting nonresonantly with the intensive one-mode cavity thermal field. Author found an exact solution of the quantum Liouville equation for the full density matrix of the system two atoms + field mode for a coherent initial state of atoms in the dressed states representation. The full system density matrix is used to calculate the two-atom reduced density matrix and to calculate the quantitative criterion for atom-atom entanglement ‒ negativity. The results of computer simulation of the time dependence of negativity showed that in the case of a model with nonresonant interaction, the presence of initial atomic coherence leads to a significant decrease in the maximum degree of atomic entanglement, in contrast to the model with resonant interaction of atoms and a field. For the resonance model, the initial atomic coherence greatly enhances the degree of atomic entanglement. |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
|