Quantumness and speedup limit of a qubit under transition-frequency modulation

Rajabalinia, Amin; Shadfar, Mahshid Khazaei; Nosrati, Farzam; Mortezapour, Ali; Morandotti, Roberto; Franco, Rosario Lo

doi:10.1103/physreva.106.062431

Cited by 1 publication

(3 citation statements)

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“…The transition frequency of the qubit is modulated sinusoidally by an external driving field. The Hamiltonian of the system is as follows: [46][47][48][49][50]…”

Section: Model and Solutionmentioning

confidence: 99%

“…for time t. Here, |1 k ⟩ denotes a single photon in mode k of the reservoir and ζ k (t) represents its probability amplitude. By Solving the time-dependent Schrödinger equation, one obtains the integro-differential equation for ζ (t) as [49] ζ (t)…”

Section: Model and Solutionmentioning

confidence: 99%

“…[35,43] Moreover, numerous studies have demonstrated that the frequency-modulation approach profoundly impacts the dynamics of space-like quantum correlations. [46][47][48][49] According to the definition of TS, the interaction between the quantum system and the environment inevitably affects the quantum state received by Bob. In simpler words, the noise from the environment considerably influences the temporal-like correlation between the system's states at different times.…”

Section: Introductionmentioning

confidence: 99%

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Enhancing quantum temporal steering via frequency modulation

Wu 吴,

Cheng 程

2024

Chinese Phys. B

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Various strategies have been proposed to harness and protect space-like quantum correlations in different models under decoherence. However, little attention has been given to temporal-like correlations, such as quantum temporal steering (TS), in this context. In this work, we investigate TS in a frequency-modulated two-level system coupled to a zero-temperature reservoir in both the weak and strong coupling regimes. We analyze the impact of various frequency-modulated parameters on the behavior of TS and non-Markovian. The results demonstrate that appropriate frequency-modulated parameters can enhance the TS of the two-level system, regardless of whether the system is experiencing Markovian or non-Markovian dynamics. Furthermore, a suitable ratio between modulation strength and frequency (i.e., all zeroes of the 0th Bessel function J 0(δ/Ω)) can significantly enhance TS in the strong coupling regime. These findings indicate that efficient and effective manipulation of quantum TS can be achieved through a frequency-modulated approach.

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“…The transition frequency of the qubit is modulated sinusoidally by an external driving field. The Hamiltonian of the system is as follows: [46][47][48][49][50]…”

Section: Model and Solutionmentioning

confidence: 99%

Section: Model and Solutionmentioning

confidence: 99%