Intrinsic decoherence effects on nonclassical correlations in a symmetric spin–orbit model

“…Notice, when Γ → 0, the above equation corresponds to the standard von Neumann equation describing unitary dynamics, [63] while a sufficiently large number of Γ causes the evolution to deteriorate from the unitary dynamics. A formal solution of the master Equation ( 10) can be written in terms of the operator-sum representation using Kraus operators M as [64,65]…”

Section: Intrinsic Decoherencementioning

confidence: 99%

Witnessing Quantum Correlations in a Hybrid Qubit‐Qutrit System Under Intrinsic Decoherence

Benabdallah

Anouz

Rahman

et al. 2023

Fortschritte der Physik

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Studying qubit‐qutrit systems is crucial to harnessing their quantum advantages, especially in quantum secure technologies. In this regard, the present work consists of considering a qubit‐qutrit system under intrinsic decoherence. For this hybrid‐spin system, the relationship between negativity, local quantum uncertainty, and local quantum Fisher information is discussed. The results show that it is possible to generate and preserve the maximally correlated states by tuning the system parameters to certain fixed values. It is also demonstrated the occurrence of the sudden death/birth phenomenon by examining the behavior of quantum correlation functions.

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“…In practice, they have been used in a variety of domains, such as condensed matter physics and high-energy physics [20,21]. In addition, a large amount of time has been put into studying Heisenberg spin chains recently, and the preservation of quantum correlations has greatly benefited as a result [22,23]. Quantum information theory methods have been used to study the reduced density matrix of the spin-1 Heisenberg chains, including looking at quantum mutual information [24], quantum discord [25], and local quantum uncertainty measure [26].…”

Section: Introductionmentioning

confidence: 99%

Biqubit Heisenberg spin chain correlations and entropic uncertainty

Rahman¹,

Zangi²,

Yang³

et al. 2023

Preprint

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We investigate the dynamics of quantum correlations and entropic uncertainty in a system of two-qubit XXZ-type Heisenberg spin chain when exposed to a magnetic and classical field simultaneously. To demonstrate entanglement, coherence, entropic uncertainty and mixedness disorder, we utilize negativity and 1 -norm of coherence, quantum memory-assisted entropic uncertainty and linear entropy functions, respectively. Besides, a dephasing static noise is considered affecting the joint scheme of the external magnetic and classical channel. The dynamics of entanglement, coherence, uncertainty, and disorder have been explicitly investigated against various several parameters of the current configuration, such as qubit-channel coupling, static noise strength, spin-spin coupling, Heisenberg spin exchange interaction, Dzyaloshinskii-Moriya interaction (DM), Kaplan, Shekhtman, Entin-Wohlman, and Aharony (KSEA) and anisotropy parameters. We show that compared to the individual application of the classical and magnetic field, their simultaneous application is more appropriate for the quantum correlations preservation. The entanglement and coherence functions have been shown to have opposite relationship with the entropic uncertainty and entropy disorder. Finally, compared to the entanglement, coherence remains strengthened in the two-qubit Heisenberg spin chain system.

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Intrinsic decoherence effects on nonclassical correlations in a symmetric spin–orbit model

Cited by 25 publications

References 74 publications

Local quantum Fisher information and local quantum uncertainty for general X states

Local quantum Fisher information and local quantum uncertainty for general X states

Witnessing Quantum Correlations in a Hybrid Qubit‐Qutrit System Under Intrinsic Decoherence

Biqubit Heisenberg spin chain correlations and entropic uncertainty

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