Influence of initial atomic coherence and direct coupling on qubits entanglement in two-qubit Tavis — Cummings model
The exact dynamics of a model consisting of two identical qubits interacting non-resonantly with the electromagnetic field mode of an ideal resonator via single-photon transitions is found in the presence of direct Ising interaction of qubits. The exact solution is used to calculate the two-qubit ne...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Samara National Research University
2025-06-01
|
| Series: | Вестник Самарского университета: Естественнонаучная серия |
| Subjects: | |
| Online Access: | https://journals.ssau.ru/est/article/viewFile/28680/11317 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850217522959220736 |
|---|---|
| author | A. Othman A. R. Farhutdinova E. K. Bashkirov |
| author_facet | A. Othman A. R. Farhutdinova E. K. Bashkirov |
| author_sort | A. Othman |
| collection | DOAJ |
| description | The exact dynamics of a model consisting of two identical qubits interacting non-resonantly with the electromagnetic field mode of an ideal resonator via single-photon transitions is found in the presence of direct Ising interaction of qubits. The exact solution is used to calculate the two-qubit negativity of qubits in the case of a coherent initial state of qubits and a thermal state of the resonator field. It is shown that in the case of resonant interaction of qubits with the field, the initial atomic coherence leads to a significant increase in the maximum degree of entanglement. The inclusion of direct Ising interaction of qubits can significantly enhance the entanglement of qubits in both coherent and non-coherent initial states of qubits. In the case of non-resonant interaction of qubits and the resonator field, the detuning leads to a weakening of the effect of atomic coherence on the dynamics of qubit entanglement. |
| format | Article |
| id | doaj-art-003bd0fb26d3410caa1984406eee6366 |
| institution | OA Journals |
| issn | 2541-7525 2712-8954 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Samara National Research University |
| record_format | Article |
| series | Вестник Самарского университета: Естественнонаучная серия |
| spelling | doaj-art-003bd0fb26d3410caa1984406eee63662025-08-20T02:08:02ZengSamara National Research UniversityВестник Самарского университета: Естественнонаучная серия2541-75252712-89542025-06-01311869810.18287/2541-7525-2025-31-1-86-988845Influence of initial atomic coherence and direct coupling on qubits entanglement in two-qubit Tavis — Cummings modelA. Othman0https://orcid.org/0009-0004-8811-2521A. R. Farhutdinova1https://orcid.org/0009-0006-2391-6320E. K. Bashkirov2https://orcid.org/0000-0001-8682-4956Samara National Research UniversitySamara National Research UniversitySamara National Research UniversityThe exact dynamics of a model consisting of two identical qubits interacting non-resonantly with the electromagnetic field mode of an ideal resonator via single-photon transitions is found in the presence of direct Ising interaction of qubits. The exact solution is used to calculate the two-qubit negativity of qubits in the case of a coherent initial state of qubits and a thermal state of the resonator field. It is shown that in the case of resonant interaction of qubits with the field, the initial atomic coherence leads to a significant increase in the maximum degree of entanglement. The inclusion of direct Ising interaction of qubits can significantly enhance the entanglement of qubits in both coherent and non-coherent initial states of qubits. In the case of non-resonant interaction of qubits and the resonator field, the detuning leads to a weakening of the effect of atomic coherence on the dynamics of qubit entanglement.https://journals.ssau.ru/est/article/viewFile/28680/11317qubitscoherent qubits statecavitythermal fieldentanglementnegativityizing coupling |
| spellingShingle | A. Othman A. R. Farhutdinova E. K. Bashkirov Influence of initial atomic coherence and direct coupling on qubits entanglement in two-qubit Tavis — Cummings model Вестник Самарского университета: Естественнонаучная серия qubits coherent qubits state cavity thermal field entanglement negativity izing coupling |
| title | Influence of initial atomic coherence and direct coupling on qubits entanglement in two-qubit Tavis — Cummings model |
| title_full | Influence of initial atomic coherence and direct coupling on qubits entanglement in two-qubit Tavis — Cummings model |
| title_fullStr | Influence of initial atomic coherence and direct coupling on qubits entanglement in two-qubit Tavis — Cummings model |
| title_full_unstemmed | Influence of initial atomic coherence and direct coupling on qubits entanglement in two-qubit Tavis — Cummings model |
| title_short | Influence of initial atomic coherence and direct coupling on qubits entanglement in two-qubit Tavis — Cummings model |
| title_sort | influence of initial atomic coherence and direct coupling on qubits entanglement in two qubit tavis cummings model |
| topic | qubits coherent qubits state cavity thermal field entanglement negativity izing coupling |
| url | https://journals.ssau.ru/est/article/viewFile/28680/11317 |
| work_keys_str_mv | AT aothman influenceofinitialatomiccoherenceanddirectcouplingonqubitsentanglementintwoqubittaviscummingsmodel AT arfarhutdinova influenceofinitialatomiccoherenceanddirectcouplingonqubitsentanglementintwoqubittaviscummingsmodel AT ekbashkirov influenceofinitialatomiccoherenceanddirectcouplingonqubitsentanglementintwoqubittaviscummingsmodel |