Entanglement Research for the Coupled Superconducting Phase Qubit and a Two-Level System
Entanglement can exist not only in the microscopic system (e.g., atom, photon, and ion trap) but also in macroscopic systems. According to recent research, entanglement can be achieved and controlled in superconducting devices. The quantum dynamics and entanglement mechanism of the coupled supercond...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Condensed Matter Physics |
| Online Access: | http://dx.doi.org/10.1155/2020/3838106 |
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| author | Jianxin Shi |
| author_facet | Jianxin Shi |
| author_sort | Jianxin Shi |
| collection | DOAJ |
| description | Entanglement can exist not only in the microscopic system (e.g., atom, photon, and ion trap) but also in macroscopic systems. According to recent research, entanglement can be achieved and controlled in superconducting devices. The quantum dynamics and entanglement mechanism of the coupled superconducting phase qubit and a two-level system (TLS) were demonstrated when the bipartite system was under microwave driving. Besides, the results reveal that when the system was experiencing decoherence, entanglement (concurrence) of the coupled superconducting phase qubit and TLS would oscillate damply with microwave driving time, even exhibiting concurrence sudden death and revival. The coupling effect of the superconducting qubit and TLS system and the resonant microwave together help to achieve entanglement, while concurrence death and concurrence revival are dependent on the decoherence source and mechanism, for example, the resonant microwave driving time acting on the bipartite coupling system. Furthermore, the simulation results show the entanglement of the coupled qubit and TLS system also depends on the purity of the initial states of the system. The article carried out a numerical simulation on the entanglement of different initial states, and the results showed that the entanglement of the coupled system changes with different initial states. For different initial states, entanglement, sudden death, and rejuvenation are still visible. |
| format | Article |
| id | doaj-art-c34a7ea64d864e949cecb9514eb9e6ac |
| institution | Kabale University |
| issn | 1687-8108 1687-8124 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Condensed Matter Physics |
| spelling | doaj-art-c34a7ea64d864e949cecb9514eb9e6ac2025-02-03T01:28:22ZengWileyAdvances in Condensed Matter Physics1687-81081687-81242020-01-01202010.1155/2020/38381063838106Entanglement Research for the Coupled Superconducting Phase Qubit and a Two-Level SystemJianxin Shi0Public Foundational Courses Department, Nanjing Vocational University of Industry Technology, Nanjing 210023, ChinaEntanglement can exist not only in the microscopic system (e.g., atom, photon, and ion trap) but also in macroscopic systems. According to recent research, entanglement can be achieved and controlled in superconducting devices. The quantum dynamics and entanglement mechanism of the coupled superconducting phase qubit and a two-level system (TLS) were demonstrated when the bipartite system was under microwave driving. Besides, the results reveal that when the system was experiencing decoherence, entanglement (concurrence) of the coupled superconducting phase qubit and TLS would oscillate damply with microwave driving time, even exhibiting concurrence sudden death and revival. The coupling effect of the superconducting qubit and TLS system and the resonant microwave together help to achieve entanglement, while concurrence death and concurrence revival are dependent on the decoherence source and mechanism, for example, the resonant microwave driving time acting on the bipartite coupling system. Furthermore, the simulation results show the entanglement of the coupled qubit and TLS system also depends on the purity of the initial states of the system. The article carried out a numerical simulation on the entanglement of different initial states, and the results showed that the entanglement of the coupled system changes with different initial states. For different initial states, entanglement, sudden death, and rejuvenation are still visible.http://dx.doi.org/10.1155/2020/3838106 |
| spellingShingle | Jianxin Shi Entanglement Research for the Coupled Superconducting Phase Qubit and a Two-Level System Advances in Condensed Matter Physics |
| title | Entanglement Research for the Coupled Superconducting Phase Qubit and a Two-Level System |
| title_full | Entanglement Research for the Coupled Superconducting Phase Qubit and a Two-Level System |
| title_fullStr | Entanglement Research for the Coupled Superconducting Phase Qubit and a Two-Level System |
| title_full_unstemmed | Entanglement Research for the Coupled Superconducting Phase Qubit and a Two-Level System |
| title_short | Entanglement Research for the Coupled Superconducting Phase Qubit and a Two-Level System |
| title_sort | entanglement research for the coupled superconducting phase qubit and a two level system |
| url | http://dx.doi.org/10.1155/2020/3838106 |
| work_keys_str_mv | AT jianxinshi entanglementresearchforthecoupledsuperconductingphasequbitandatwolevelsystem |