Single and double changes of entanglement

Metwally, N.

doi:10.1364/josab.31.000691

Cited by 14 publications

(8 citation statements)

References 26 publications

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“…(3a), where only the qubit is driven by the CERF. It is clear that, the entanglement decays slowly and the phenomena of the sudden changes of entanglement appear clearly [29]. The decay time is much larger than that depicted in Fig.…”

Section: Fig(3b)mentioning

confidence: 77%

Sudden death and rebirth of entanglement for different dimensional systems driven by a classical random external field

2016

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The entangled behavior of different dimensional systems driven by classical external random field is investigated. The amount of the survival entanglement between the components of each system is quantified. There are different behaviors of entanglement that come into view decay, sudden death, sudden birth and long-lived entanglement. The maximum entangled states which can be generated from any of theses suggested systems are much fragile than the partially entangled ones. The systems of larger dimensions are more robust than those of smaller dimensions systems, where the entanglement decay smoothly, gradually and may vanish for a very short time. For the class of 2 × 3 dimensional system, the one parameter family is found to be more robust than the two parameters family. Although the entanglement of driven 2 × 3 dimensional system is very sensitive to the classical external random field, one can use them to generate a long-lived entanglement.

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Section: Fig(3b)mentioning

confidence: 77%

Sudden death and rebirth of entanglement for different dimensional systems driven by a classical random external field

2016

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“…In this work, we investigate the effect of the generalized amplitude damping channel on two classes of tripartite entangled states: GHZ and GHZ-like states. In this study, we try to answer the following questions: (i) Is the effect of the generalized amplitude damping channel on a tripartite states similar to that predicted for two qubit systems as shown in [4,5]?. In other words, can one freeze the effect of the generalized amplitude damping channel when tripartite state passes through it.…”

Section: Introductionmentioning

confidence: 97%

“…Practically, it is often required to send some parts of the generated entangled states from the source to remote users [1]. Each transmitted subsystem interacts with its environment locally and consequently leads to lose some of entangled properties of the multipartite system [2,3,4,5]. Consequently, the efficiency of using these decohered entangled states as quantum channels to perform quantum teleportation decreases.…”

Section: Introductionmentioning

confidence: 99%

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Entanglement and quantum teleportation via decohered tripartite entangled states

Metwally

2014

Annals of Physics

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The entanglement behavior of two classes of multi-qubit system, GHZ and GHZ like states passing through a generalized amplitude damping channel is discussed. Despite this channel causes degradation of the entangled properties and consequently their abilities to perform quantum teleportation, one can always improve the lower values of the entanglement and the fidelity of the teleportrd state by controlling on Bell measurements, analyzer angle and channel's strength. Using GHZ-like state within a generalized amplitude damping channel is much better than using the normal GHZstate, where the decay rate of entanglement and the fidelity of the teleported states are smaller than those depicted for GHZ state.

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“…[7], have investigated the effect of different types of noise channels on the one-norm geometric discord and showed that the effect of the noise channel can be frozen. Metwally showed that the phenomena of sudden single and double changes and the sudden death of entanglement are reported for identical and non-identical noise [8]. Also, the behavior of a multi-qubit system in the presence of the amplitude damping channel is investigated in [9], where the possibility of performing quantum teleportation with decohered states was discussed.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of three-qubit systems in a noisy environment

Metwally

Almannaei

2016

Can. J. Phys.

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Some properties of multi-qubit systems interacting with noisy environment is discussed. The amount of the survival entanglement is quantified for the GHZ and W-states. It is shown that the entanglement decay depends on the noise type ( correlated or non-correlated), number of interacted qubits with the environment and the initial state which passes through this noisy environment. In general, the GHZ is more fragile than the W-state. The phenomena of entanglement sudden death appears only for non-correlated noise.

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Single and double changes of entanglement

Cited by 14 publications

References 26 publications

Sudden death and rebirth of entanglement for different dimensional systems driven by a classical random external field

Sudden death and rebirth of entanglement for different dimensional systems driven by a classical random external field

Entanglement and quantum teleportation via decohered tripartite entangled states

Dynamics of three-qubit systems in a noisy environment

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