Research Paper: Influence of Intrinsic Decoherence on Entanglement and Teleportation in Jaynes- Cummings Model in a Two- Qutrit System

Document Type : Research Paper

Authors

1 Assistant Professor, Department of Physics, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran

2 M.Sc. in Physics, Department of Physics, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran.

3 Associate Professor, Department of Physics, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran

Abstract

This paper uses the Jaynes-Cummings model to investigate the entanglement of a two-qutrit state in a cavity. The entanglement is analyzed as a function of decoherence rate, coupling constant, and frequency of atomic transition. We note that this entanglement is decreased passing time and the negativity is an increasing function of the frequency of atomic transition. The negativity at first is an increasing function of the coupling constant, then for higher values of the coupling constant, the negativity decreases with the increase of the coupling constant and over time it tends to zero. We also investigate the influence of intrinsic decoherence on quantum teleportation via this two-qutrit state. We plot the fidelity as a function of the decoherence rate, the coupling constant, and the atomic transition frequency. The results show that the fidelity decreases with an increasing decoherence rate. Moreover, the frequency of fidelity oscillations is an increasing function of the atomic transition frequency. The fidelity is relatively independent of the coupling constant, especially at a higher value of the coupling constant.

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References

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History

  • Receive Date: 10 June 2022
  • Revise Date: 04 December 2022
  • Accept Date: 24 January 2023

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