Enhancing entanglement, local and non-local information of accelerated two-qubit and two-qutrit systems via weak-reverse measurements

Metwally, N.

doi:10.1209/0295-5075/116/60006

Cited by 21 publications

(14 citation statements)

References 27 publications

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“…The local information I loc for a qubit and the non-local I nonloc information between the two qubits are defined by [25,26]…”

Section: Local and Non-local Informationmentioning

confidence: 99%

“…The local and non-local information for (25) are shown in Figure (14). As it is displayed from Figure(14a), I nonloc increases very slightly as r increases, where the predicted amount of the nonlocal information is larger than that displayed in Figure (12), namely before masking process which means it contains an extra information.…”

mentioning

confidence: 91%

“…When x = ±1, the maximum value F r C = 1 is obtained while F x C = cot 2 r, which tends to infinity at r → 0. Therefore, the non-local product state (25) can be used to estimate a class of initial states which are defined by |x| < 1 and arbitrary y, z. The behavior of the classical Fisher information F r C and F x C are displayed in Figure (13).…”

mentioning

confidence: 99%

“…Since, the entanglement decreases as one increases the acceleration r, the classical correlation increases on the expanse of the quantum correlation. On the other hand the state (25) contains only classical information, Therefore the CFI increases with respect to the acceleration r.…”

mentioning

confidence: 99%

“…Figure 13: Estimating (a) the acceleration parameter r, and (b) the x parameter by using(25). It is assumed that the system is initially prepared in a Werner state with x = y = z = −0.85 for the dashed curve, x = y = z = −0.75 for the dotted curve and the Xstate with x = −0.6, y = −0.2 and z = −0.5 for the solid curve.…”

mentioning

confidence: 99%

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The concealment of accelerated information is possible

Abdelwahab¹,

Metwally²,

Mahran³

et al. 2020

Preprint

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The possibility of masking an accelerated two-qubit system by using a minimum number of qubits is discussed. It is shown that, the information may be masked in either entangled local states or product non-local separable states. We examine that each partition of these states satisfies the masking conditions. Due to the presence of non-local separable partition, one may consider that it is a type of quantum data hiding scheme. The local /non-local information encoded in the masked entangled state is robust against the decoherence of the acceleration process. The possibility of estimating the acceleration parameter via the entangled/separable masked state increases as the initial entanglement value increases. The efficiency of the masking process is examined by quantifying the fidelity of the accelerated state and its subsystems. It is shown that, the fidelity of the masked state is maximum at small initial acceleration, while the minimum fidelity is more than 96%.

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“…The local information I loc for a qubit and the non-local I nonloc information between the two qubits are defined by [25,26]…”

Section: Local and Non-local Informationmentioning

confidence: 99%

mentioning

confidence: 91%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

The concealment of accelerated information is possible

Abdelwahab¹,

Metwally²,

Mahran³

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

Enhancing the information of nonlinear SU(1, 1) quantum systems interacting with a two-level atom

2022

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The effect of nonlinearity, initial atomic state, and different resonance cases on the interaction between nonlinear SU (1, 1) quantum states and a two-level atom is discussed. The optimal behaviours of decoherence, entanglement and quantum coherence are predicted via using the skew information, tomographic entropy, and the relative entropy of coherence, respectively. It is shown that the detuning parameter has a destructive effect on the coherence and consequently on the entanglement if the quantum system is regulated in the ideal SU (1, 1) quantum systems. For the nonlinear SU (1, 1) quantum systems, the ability to suppress the decay of entanglement induced by the detuning may be increased by preparing the initial atomic state in its excited state.

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Non-classical correlations of accelerated observers interacting with a classical stochastic noise beyond the single mode approximation

2023

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This paper investigates the behaviour of the quantum correlations for an accelerated two-qubit system during its interaction with a classical stochastic field, utilizing the Wigner function and concurrence. The non-classical behaviour is indicated by negative values of the Wigner function, while the degree of entanglement is demonstrated by the concurrence. To consider acceleration and interaction with a common or independent environment, we discard the single-mode approximation and utilize the Unruh construction of the quantum field mode in our analysis. Our results suggest that coherence suppression is caused by the acceleration effect, noise strength, and noise frequency. Through an examination of quantum concurrence, this study analyses the level of quantum entanglement that corresponds positively with negative values of the Wigner function. The findings indicate that coherence degradation in the initial system is reduced when observers interact independently with their environments, as opposed to interacting with a common environment. Additionally, the acceleration of both observers has an impact on coherence reduction. During system evolution, the Wigner function displays collapse and reappearance behaviour, while quantum entanglement undergoes local collapse and revival phenomena. Notably, common noise situations exhibit more rapid variation in both the Wigner function and entanglement compared to independent noise configurations.

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Enhancing entanglement, local and non-local information of accelerated two-qubit and two-qutrit systems via weak-reverse measurements

Cited by 21 publications

References 27 publications

The concealment of accelerated information is possible

The concealment of accelerated information is possible

Enhancing the information of nonlinear SU(1, 1) quantum systems interacting with a two-level atom

Non-classical correlations of accelerated observers interacting with a classical stochastic noise beyond the single mode approximation

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