Quantum Fisher information versus quantum skew information in double quantum dots with Rashba interaction

Dahbi, Zakaria; Oumennana, Mansoura; Anouz, K. El; Mansour, M.; Allati, A. El

doi:10.1007/s00340-022-07963-z

Cited by 11 publications

(3 citation statements)

References 48 publications

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“…LQU measures the minimum quantum uncertainty present in a nonclassical state when calculating a specific local observable. Interestingly, LQU is readily measured for all two-party systems and has been widely analyzed and employed in numerous papers [32][33][34][35][36][37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

Quantum interferometric power versus quantum correlations in a graphene layer system with a scattering process under thermal noise

Bouafia,

Mansour

2023

Laser Phys. Lett.

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Cutting-edge quantum processing technology is currently exploring the remarkable electronic properties of graphene layers, such as their high mobility and thermal conductivity. Our research is dedicated to investigating the behavior of quantum resources within a graphene layer system with a scattering process, specifically focusing on quantum interferometric power (QIP) and quantum correlations, while taking into account the influence of thermal noise. To quantify these correlations, we employ measures like local quantum uncertainty (LQU) and logarithmic negativity (LN). We examine how factors like temperature, inter-valley scattering processes strength, and other system parameters affect both QIP and quantum correlations. Our results reveal that higher temperatures lead to a reduction in QIP and non-classical correlations within graphene layers. Moreover, it is noteworthy that QIP and LQU respond similarly to changes in temperature, whereas LN is more sensitive to these variations. By optimizing system parameters such as band parameter, wavenumber operators and scattering processes strength, we can mitigate the impact of thermal noise and enhance the quantum advantages of graphene-based quantum processing

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Section: Introductionmentioning

confidence: 99%

Quantum interferometric power versus quantum correlations in a graphene layer system with a scattering process under thermal noise

Bouafia,

Mansour

2023

Laser Phys. Lett.

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“…[ 62 ] In the same direction, Rashba spin–orbit interaction is also considered when the authors in ref. [63] devoted the study of quantum correlations via quantum Fisher information and local quantum uncertainty. Besides, the authors in ref.…”

Section: Introductionmentioning

confidence: 99%

Prospecting Quantum Correlations and Examining Teleportation Fidelity in a Pair of Coupled Double Quantum Dots System

Ait Chlih,

Rahman,

Habiballah

2023

Annalen der Physik

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The topic of improving the ability of quantum systems to retain non‐local features and enhance the efficiency of quantum protocols continues. This study delves into the thermal investigation of quantum correlations and teleportation fidelity of a two‐qubit teleported state using excess electrons in a coupled double quantum dots system as a quantum channel. The study employs three reliable quantum quantifiers to prospect the resourcefulness and non‐classicality of the system. The findings suggest that preserving quantum correlations and optimizing teleportation fidelity require minimizing tunneling coupling and maximizing Coulomb interaction. The study has significant implications for quantum physics and its practical applications in quantum information processing.

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“…In this regard, the thermal interaction picture of the channels has been studied using the concept of Gibb's density matrix operation [2]. Besides this, magnetic fields have also been used to demonstrate the quantum correlations' dynamics explicitly [3]. Most importantly, the local channels have been successfully used for decades for the transmission of information [4].…”

Section: Introductionmentioning

confidence: 99%

Probing a Hybrid Channel for the Dynamics of Non-Local Features

Rahman,

Yang,

Zangi

et al. 2023

Symmetry

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Effective information transmission is a central element in quantum information protocols, but the quest for optimal efficiency in channels with symmetrical characteristics remains a prominent challenge in quantum information science. In light of this challenge, we introduce a hybrid channel that encompasses thermal, magnetic, and local components, each simultaneously endowed with characteristics that enhance and diminish quantum correlations. To investigate the symmetry of this hybrid channel, we explored the quantum correlations of a simple two-qubit Heisenberg spin state, quantified using measures such as negativity, ℓ1-norm coherence, entropic uncertainty, and entropy functions. Our findings revealed that the hybrid channel can be adeptly tailored to preserve quantum correlations, surpassing the capabilities of its individual components. We also identified optimal parameterizations to attain maximum entanglement from mixed entangled/separable states, even in the presence of local dephasing. Notably, various parameters and quantum features, including non-Markovianity, exhibited distinct behaviors in the context of this hybrid channel. Ultimately, we discuss potential experimental applications of this configuration.

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Quantum Fisher information versus quantum skew information in double quantum dots with Rashba interaction

Cited by 11 publications

References 48 publications

Quantum interferometric power versus quantum correlations in a graphene layer system with a scattering process under thermal noise

Quantum interferometric power versus quantum correlations in a graphene layer system with a scattering process under thermal noise

Prospecting Quantum Correlations and Examining Teleportation Fidelity in a Pair of Coupled Double Quantum Dots System

Probing a Hybrid Channel for the Dynamics of Non-Local Features

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