Coherent State Control to Recover Quantum Entanglement and Coherence
How to analytically deal with the entanglement and coherence dynamics of separated Jaynes−Cummings nodes with continuous-variable fields is still an open question. We here generalize this model to a more common situation including either a small or large qubit-field detuning, and obtain tw...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-09-01
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| Series: | Entropy |
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| Online Access: | https://www.mdpi.com/1099-4300/21/10/917 |
| _version_ | 1811263005269164032 |
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| author | Li-Tuo Shen Zhi-Cheng Shi Zhen-Biao Yang |
| author_facet | Li-Tuo Shen Zhi-Cheng Shi Zhen-Biao Yang |
| author_sort | Li-Tuo Shen |
| collection | DOAJ |
| description | How to analytically deal with the entanglement and coherence dynamics of separated Jaynes−Cummings nodes with continuous-variable fields is still an open question. We here generalize this model to a more common situation including either a small or large qubit-field detuning, and obtain two new analytical formulas. The X-state simplification, Fock-state shortcut and detuning-limit approximation work together in an amazingly accurate way, which agrees with the numerical results. The new formulas almost perfectly predict the two-qubit entanglement dynamics both in sudden death and rebirth phenomenon for detuning interactions. We find that when both the qubit-field detuning and amplitude of coherent states are large enough, the maximal entanglement and coherence peaks can be fully and periodically retrieved, and their revival periods both increase linearly with the increasing detuning. |
| first_indexed | 2024-04-12T19:38:14Z |
| format | Article |
| id | doaj.art-002b8100786e4e79a3764213c612af78 |
| institution | Directory Open Access Journal |
| issn | 1099-4300 |
| language | English |
| last_indexed | 2024-04-12T19:38:14Z |
| publishDate | 2019-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Entropy |
| spelling | doaj.art-002b8100786e4e79a3764213c612af782022-12-22T03:19:10ZengMDPI AGEntropy1099-43002019-09-01211091710.3390/e21100917e21100917Coherent State Control to Recover Quantum Entanglement and CoherenceLi-Tuo Shen0Zhi-Cheng Shi1Zhen-Biao Yang2Fujian Key Laboratory of Quantum Information and Quantum Optics, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350116, ChinaFujian Key Laboratory of Quantum Information and Quantum Optics, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350116, ChinaFujian Key Laboratory of Quantum Information and Quantum Optics, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350116, ChinaHow to analytically deal with the entanglement and coherence dynamics of separated Jaynes−Cummings nodes with continuous-variable fields is still an open question. We here generalize this model to a more common situation including either a small or large qubit-field detuning, and obtain two new analytical formulas. The X-state simplification, Fock-state shortcut and detuning-limit approximation work together in an amazingly accurate way, which agrees with the numerical results. The new formulas almost perfectly predict the two-qubit entanglement dynamics both in sudden death and rebirth phenomenon for detuning interactions. We find that when both the qubit-field detuning and amplitude of coherent states are large enough, the maximal entanglement and coherence peaks can be fully and periodically retrieved, and their revival periods both increase linearly with the increasing detuning.https://www.mdpi.com/1099-4300/21/10/917coherent stateJaynes–Cummings modelsentanglementcoherenceopen quantum system |
| spellingShingle | Li-Tuo Shen Zhi-Cheng Shi Zhen-Biao Yang Coherent State Control to Recover Quantum Entanglement and Coherence Entropy coherent state Jaynes–Cummings models entanglement coherence open quantum system |
| title | Coherent State Control to Recover Quantum Entanglement and Coherence |
| title_full | Coherent State Control to Recover Quantum Entanglement and Coherence |
| title_fullStr | Coherent State Control to Recover Quantum Entanglement and Coherence |
| title_full_unstemmed | Coherent State Control to Recover Quantum Entanglement and Coherence |
| title_short | Coherent State Control to Recover Quantum Entanglement and Coherence |
| title_sort | coherent state control to recover quantum entanglement and coherence |
| topic | coherent state Jaynes–Cummings models entanglement coherence open quantum system |
| url | https://www.mdpi.com/1099-4300/21/10/917 |
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