Results 41 to 50 of about 853 (152)
Thermal entanglement in the three-qubit Tavis-Cummings model with Kerr nonlinearity
Компьютерная оптикаWe obtained a solution of the Liouville equation for a system of three identical qubits interacting without detuning with a thermal field of a cavity with a Kerr medium, for two type of initial pure genuine W-entangled qubits states.
A.R. Bagrov, E.K. Bashkirov
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Quantum discord and entanglement in grover search algorithm
Open Physics, 2016 Imperfections and noise in realistic quantum computers may seriously affect the accuracy of quantum algorithms. In this article we explore the impact of static imperfections on quantum entanglement as well as non-entangled quantum correlations in Grover ...
Ye Bin +3 more
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Effects of quantum error correction on entanglement sudden death [PDF]
Quantum Information and Computation, 2014 We investigate the effects of error correction on non-local quantum coherence as a function of time, extending the study by Sainz and Bjork. We consider error correction of amplitude damping, pure phase damping and combinations of amplitude and phase damping as they affect both fidelity and quantum entanglement.
Muhammed Yönaç, Joseph H. Eberly
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Postponing Distillability Sudden Death in a Correlated Dephasing Channel
Entropy, 2020 We investigated the dynamics of a two-qutrit system in a correlated quantum channel. The partial correlations between consecutive actions of the channel can effectively postpone the phenomenon of distillability sudden death (DSD) and broaden the range of
Guanghao Xue, Liang Qiu
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Results in Physics, 2022 This study investigates two-qubit local quantum Fisher information correlation (LQFI), entanglement of formation (EoF), and two-qubit Jensen–Shannon coherence as a result of cavity–qubit coupling via intensity dependent and qubit–qubit interactions ...
A.-B.A. Mohamed, H. Eleuch
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Time-invariant entanglement and sudden death of nonlocality [PDF]
Physical Review A, 2016 We investigate both theoretically and experimentally the dynamics of entanglement and non-locality for two qubits immersed in a global pure dephasing environment. We demonstrate the existence of a class of states for which entanglement is forever frozen during the dynamics, even if the state of the system does evolve.
Liu, Bi-Heng +10 more
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Tripartite entanglement witnesses and entanglement sudden death [PDF]
Physical Review A, 2009 I explore entanglement dynamics in a three qubit system comparing the ability of entanglement witnesses to detect tripartite entanglement to the phenomenon of entanglement sudden death (ESD). Using a system subject to dephasing I invoke entanglement witnesses to detect tripartite Greenberger-Horne-Zeilinger (GHZ)-type and $W$-type entanglement and ...
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Gaussian quantum entanglement in curved spacetime
Results in Physics, 2023 The influence of Hawking radiation on quantum entanglement for bimodal Gaussian states near a Schwarzschild black hole is investigated. It is shown that for a thermal squeezed state of a bimodal bosonic system the Hawking radiation reduces and even can ...
Madalin Calamanciuc, Aurelian Isar
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Sudden death of entanglement at finite temperature [PDF]
Physical Review A, 2008 We consider the decay of quantum entanglement quantified by the concurrence of a pair of two-level systems, each of which is interacting with a reservoir at finite temperature $T$. For a broad class of initially entangled states, we demonstrate that the system always becomes disentangled in a finite time, i.e., ``entanglement sudden death'' occurs ...
Asma Al-Qasimi, Daniel F. V. James
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Skew information correlations beyond entanglement in dissipative two Su(2)-systems
Results in Physics, 2019 We investigate the dynamics of quantum correlations [including skew information correlations beyond entanglement] of two isolated Su(2)-systems that are initially in a maximum Bell state or in a separable state.
A.-B.A. Mohamed, H. Eleuch
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