中国物理B ›› 2022, Vol. 31 ›› Issue (5): 50306-050306.doi: 10.1088/1674-1056/ac2f36

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Effects of colored noise on the dynamics of quantum entanglement of a one-parameter qubit—qutrit system

Odette Melachio Tiokang1,2, Fridolin Nya Tchangnwa2, Jaures Diffo Tchinda2, Arthur Tsamouo Tsokeng1, and Martin Tchoffo1,3,†   

  1. 1 Research Unit of Condensed Matter, Electronic and Signal Processing, Department of Physics, Dschang School of Sciences and Technology, University of Dschang, PO Box:67 Dschang, Cameroon;
    2 Material Science Research Group, Physics Laboratory, Department of Physics, Post Graduate School, University of Maroua, PO Box:814 Maroua, Cameroon;
    3 Centre d'Etudes et de Recherches en Agronomie et en Biodiversite, Faculte d'Agronomie et des Sciences Agricoles, Universite de Dschang, Cameroun
  • 收稿日期:2021-06-18 修回日期:2021-09-12 发布日期:2022-04-21
  • 通讯作者: Martin Tchoffo,E-mail:mtchoffo2000@yahoo.fr E-mail:mtchoffo2000@yahoo.fr

Effects of colored noise on the dynamics of quantum entanglement of a one-parameter qubit—qutrit system

Odette Melachio Tiokang1,2, Fridolin Nya Tchangnwa2, Jaures Diffo Tchinda2, Arthur Tsamouo Tsokeng1, and Martin Tchoffo1,3,†   

  1. 1 Research Unit of Condensed Matter, Electronic and Signal Processing, Department of Physics, Dschang School of Sciences and Technology, University of Dschang, PO Box:67 Dschang, Cameroon;
    2 Material Science Research Group, Physics Laboratory, Department of Physics, Post Graduate School, University of Maroua, PO Box:814 Maroua, Cameroon;
    3 Centre d'Etudes et de Recherches en Agronomie et en Biodiversite, Faculte d'Agronomie et des Sciences Agricoles, Universite de Dschang, Cameroun
  • Received:2021-06-18 Revised:2021-09-12 Published:2022-04-21
  • Contact: Martin Tchoffo,E-mail:mtchoffo2000@yahoo.fr E-mail:mtchoffo2000@yahoo.fr
  • About author:2021-10-13

摘要: We analyzed the effect of colored noise on the negativity dynamics of a hybrid system consisting of a qubit-qutrit and not interacting, prepared from the start in an entangled one-parameter state and acting with noise in local and non-local environments. In this pink and brown noise we investigated two different situations: in the first situation, the noise is produced by a bistable oscillator with an unknown exchange rate; however, in the second situation, the noise is generated by a set of bistable oscillators. We found that entanglement decreases with time to zero, and undergoes the phenomenon of sudden death and rebirth. The pink noise is more prone to entanglement than the brown noise and the non-local environment is more prone to entanglement than the local one. When the number of fluctuators is increased, entanglement decays faster and finally, for certain parameters of the initial state, the subsystems are not affected by the noise.

关键词: entanglement, hybrid system, qutrit, colored noise

Abstract: We analyzed the effect of colored noise on the negativity dynamics of a hybrid system consisting of a qubit-qutrit and not interacting, prepared from the start in an entangled one-parameter state and acting with noise in local and non-local environments. In this pink and brown noise we investigated two different situations: in the first situation, the noise is produced by a bistable oscillator with an unknown exchange rate; however, in the second situation, the noise is generated by a set of bistable oscillators. We found that entanglement decreases with time to zero, and undergoes the phenomenon of sudden death and rebirth. The pink noise is more prone to entanglement than the brown noise and the non-local environment is more prone to entanglement than the local one. When the number of fluctuators is increased, entanglement decays faster and finally, for certain parameters of the initial state, the subsystems are not affected by the noise.

Key words: entanglement, hybrid system, qutrit, colored noise

中图分类号:  (Entanglement measures, witnesses, and other characterizations)

  • 03.67.Mn