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Paper   IPM / P / 17325
School of Physics
  Title:   Quantum speed limit of Jaynes cummings model with detuning for arbitrary initial states
1.  Y. Shahri
2.  M. Hadipour
3.  S. Haddadi
4.  H. Dolatkhah
5.  S. Haseli
  Status:   Published
  Journal: Phys. Lett. A
  Vol.:  470
  Year:  2023
  Pages:   128783
  Supported by:  IPM
The quantum speed limit (QSL) of the Jaynes-Cummings model with detuning for arbitrary initial states is investigated. We mainly focus on the influences of the detuning, width of Lorentzian spectral density, and coherence of the initial state on the non-Markovian speedup evolution in an open system. It is found that even in the Markovian regime, increasing the detuning parameter leads to quantum speedup. Moreover, we reveal that the QSL has an inverse relation with the population of the initial excited state. Notably, we show that the QSL depends on the quantum coherence of the system's initial state such that the maximal coherent state can saturate its bound.

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