Entanglement of two dipole-couples qubits induced by a thermal field of a cavity with Kerr medium
In the present work, we investigated the dynamics of two identical superconducting qubits interacting with the mode of the quantum electromagnetic field of a microwave coplanar cavity with a Kerr medium in the presence of an effective dipole-dipole interaction of the qubits. We have found an exact s...
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| Format: | Article |
| Language: | English |
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Povolzhskiy State University of Telecommunications & Informatics
2021-11-01
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| Series: | Физика волновых процессов и радиотехнические системы |
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| Online Access: | https://journals.ssau.ru/pwp/article/viewFile/9807/8632 |
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| author | Rodion K. Zakharov Evgeny K. Bashkirov |
| author_facet | Rodion K. Zakharov Evgeny K. Bashkirov |
| author_sort | Rodion K. Zakharov |
| collection | DOAJ |
| description | In the present work, we investigated the dynamics of two identical superconducting qubits interacting with the mode of the quantum electromagnetic field of a microwave coplanar cavity with a Kerr medium in the presence of an effective dipole-dipole interaction of the qubits. We have found an exact solution of the quantum Liouville equation for the complete density matrix of the system under consideration for the Fock and thermal chaotic initial states of the cavityr field. The exact solution for the full density matrix was used to determine the reduced qubit density matrix and to calculate the entanglement parameter – concurrence. Computer simulation of the time dependence of the concurrshowed that for certain initial states of qubits, their entanglement can be significantly increased in the presence of a Kerr medium and direct dipole-dipole interaction. |
| first_indexed | 2024-03-08T21:07:11Z |
| format | Article |
| id | doaj.art-243b84f95af64f9894e83d525664644f |
| institution | Directory Open Access Journal |
| issn | 1810-3189 2782-294X |
| language | English |
| last_indexed | 2024-03-08T21:07:11Z |
| publishDate | 2021-11-01 |
| publisher | Povolzhskiy State University of Telecommunications & Informatics |
| record_format | Article |
| series | Физика волновых процессов и радиотехнические системы |
| spelling | doaj.art-243b84f95af64f9894e83d525664644f2023-12-22T10:31:41ZengPovolzhskiy State University of Telecommunications & InformaticsФизика волновых процессов и радиотехнические системы1810-31892782-294X2021-11-0124391710.18469/1810-3189.2021.24.3.9-178427Entanglement of two dipole-couples qubits induced by a thermal field of a cavity with Kerr mediumRodion K. Zakharov0Evgeny K. Bashkirov1https://orcid.org/0000-0003-2569-1322Samara National Research UniversitySamara National Research UniversityIn the present work, we investigated the dynamics of two identical superconducting qubits interacting with the mode of the quantum electromagnetic field of a microwave coplanar cavity with a Kerr medium in the presence of an effective dipole-dipole interaction of the qubits. We have found an exact solution of the quantum Liouville equation for the complete density matrix of the system under consideration for the Fock and thermal chaotic initial states of the cavityr field. The exact solution for the full density matrix was used to determine the reduced qubit density matrix and to calculate the entanglement parameter – concurrence. Computer simulation of the time dependence of the concurrshowed that for certain initial states of qubits, their entanglement can be significantly increased in the presence of a Kerr medium and direct dipole-dipole interaction.https://journals.ssau.ru/pwp/article/viewFile/9807/8632superconducting qubitskerr nonlinearitydipole-dipole interactionfock and thermal fieldentanglementconcurrence |
| spellingShingle | Rodion K. Zakharov Evgeny K. Bashkirov Entanglement of two dipole-couples qubits induced by a thermal field of a cavity with Kerr medium Физика волновых процессов и радиотехнические системы superconducting qubits kerr nonlinearity dipole-dipole interaction fock and thermal field entanglement concurrence |
| title | Entanglement of two dipole-couples qubits induced by a thermal field of a cavity with Kerr medium |
| title_full | Entanglement of two dipole-couples qubits induced by a thermal field of a cavity with Kerr medium |
| title_fullStr | Entanglement of two dipole-couples qubits induced by a thermal field of a cavity with Kerr medium |
| title_full_unstemmed | Entanglement of two dipole-couples qubits induced by a thermal field of a cavity with Kerr medium |
| title_short | Entanglement of two dipole-couples qubits induced by a thermal field of a cavity with Kerr medium |
| title_sort | entanglement of two dipole couples qubits induced by a thermal field of a cavity with kerr medium |
| topic | superconducting qubits kerr nonlinearity dipole-dipole interaction fock and thermal field entanglement concurrence |
| url | https://journals.ssau.ru/pwp/article/viewFile/9807/8632 |
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