Dynamics of the fidelity and the negativity criterion for three-qubit Jaynes–Cummings model
This paper presents an exact solution for the evolution operator of the three-qubit Jaynes-Cummings model. It is assumed that the qubits are prepared at the initial moment of time in genuine entangled W- and GHZ-type states, and the field is in a vacuum state. Based on the exact solution, wave functions, density matrix elements, and qubit entanglement parameters - the pairwise negativity criterion and the fidelity - were calculated. Using the entanglement parameters, the full analysis of the qubit entanglement dynamics was performed.
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Keywords
qubits, sudden death of entanglement, resonator, fidelity, vacuum field, negativityAuthors
| Name | Organization | |
| Bagrov Alexander R. | Samara National Research University | alexander.bagrov@mail.ru |
| Bashkirov Eugene K. | Samara National Research University | bashkirov.ek@ssau.ru |
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Dynamics of the fidelity and the negativity criterion for three-qubit Jaynes–Cummings model | Izvestiya vuzov. Fizika. 2025. № 10. DOI: 10.17223/00213411/68/10/13
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