The pairwise quantum correlations for teleported state via a symmetric multi-qubit system

Ahadpour, Sodeif; Мирмасоуди, Фороузан

doi:10.31349/revmexfis.65.412

Cited by 3 publications

(2 citation statements)

References 33 publications

(36 reference statements)

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“…The two-qubit reduced state of the states with exchange symmetry and parity can be obtained randomly from these states in computational basis |00〉,|01〉,|10〉,|11〉. From (6), the two-qubit reduced density matrix for the one-axis twisting model can be represented by [70][71][72][73][74][75][76][77][78]…”

Section: Initial State and Noisy Channelsmentioning

confidence: 99%

Exploration of entropic uncertainty bound in a symmetric multi-qubit system under noisy channels

2020

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Considering one of the particles as a quantum memory in a bipartite system can remarkably improve the measurement accuracy for two incompatible observables. Herein, we study quantum-memoryassisted entropic uncertainty bound for an arbitrary two-qubit X-state, and then we get a clear formula as the entropic uncertainty bound. In the following, we examine analytically and numerically the dynamics of entropic uncertainty bound in a symmetric multi-qubit system under four types of noisy channels, i.e. phase-flip, amplitude damping, phase-damping, and depolarizing channels. Our results show that the entropic uncertainty bound dynamics is related to the number of particles and especially the noise channel used. Noteworthy, our remarks reveal that under the amplitude damping channel, the entropic uncertainty bound can be suppressed during the time. It turns out that under an amplitude damping channel, these results can be important in practical goals where the minimum uncertainty is required such as quantum computation. † at all times. The uncertainty principle is one of the important and fundamental concepts in quantum theory. It defines the distinction between the classical and the quantum world. The uncertainty principle has been first introduced by Heisenberg [6]. Originally, he proved that the momentum and location of a particle could not be determined simultaneously with high accuracy. In fact, the accurate measurement of one observable reduces the accuracy of another observable measurement. Up to now, the uncertainty principle has been formulated in different ways. However, the most important and fundamental relation is presented by Schrödinger [7] and Robertson [8]. They claimed that the following relation is satisfied for two arbitrary incompatible observables U and V as RECEIVED

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Section: Initial State and Noisy Channelsmentioning

confidence: 99%

Exploration of entropic uncertainty bound in a symmetric multi-qubit system under noisy channels

2020

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“…As a result, the communication accomplished under noisy channels may not be trustable because the receiver may obtain partial or degrade information different from the sender's information. Studying how decoherence affects quantum correlations has been investigated in several quantum systems [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

The role of noisy channels in quantum teleportation

Ahadpour

Мирмасоуди

2020

Rev. Mex. Fís.

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In quantum information theory, effects of quantum noise on teleportation are undeniable. Hence,we investigate the effect of noisy channels including amplitude damping, phase damping, depolarizing and phase ip on the teleported state between Alice and Bob where they share an entangled state by using atom-eld interaction state. We analyze the delity and quantum correlations as a function of decoherence rates and time scale of a state to be teleported. We observe that the average delityand quantum correlations accurately depend on types of noise acting on quantum channels. It is found that atom-eld interaction states are affected by amplitude damping channel are more useful for teleportation than when the shared qubites are affected by noisy channels such as AD channel and phase ip. We also observe that if the quantum channels is subject to phase ip noise, the average delity reproduces initial quantum correlations to possible values. On the other hand,not only all the noisy quantum channels do not always destroy average delity but also they can yield the highest delity in noisy conditions. In the current demonstration, our results provide that the average delity can have larger than 2/3 in front of the noise of named other channels with increasing decoherenc strength. Success in quantum states transfer in the present noise establishes the important of studing noisy channels.

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Non-Markovianity as a resource for quantum correlation teleportation

2021

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Quantum teleportation of the quantum correlated states via noisy channels is investigated. The noisy channels are realized by a couple of two-level atoms (qubits) embedded in a zero-temperature bosonic bath. The entanglement of the channels is provided by the interqubit interaction and/or through the memory of the environment. Especially for the case of noninteracting qubits, the resource of the teleportation can be supplied by the entangled state of the channel, which is provided by information backflow in the non-Markovian regime of the evolution. More non-Markovianity of the dynamics generates a higher amount of induced entanglement and hence enhances the quality of the quantum correlation teleportation process. When the degree of non-Markovianity of dynamics is sufficiently high, quantum teleportation, which is superior to classical communication, is achievable.

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The pairwise quantum correlations for teleported state via a symmetric multi-qubit system

Cited by 3 publications

References 33 publications

Exploration of entropic uncertainty bound in a symmetric multi-qubit system under noisy channels

Exploration of entropic uncertainty bound in a symmetric multi-qubit system under noisy channels

The role of noisy channels in quantum teleportation

Non-Markovianity as a resource for quantum correlation teleportation

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