Enhanced entanglement and quantum teleportation of two-mode squeezed vacuum state via multistage non-Gaussian operations

Đức, Trương Minh; Đạt, Trần Quang

doi:10.1016/j.ijleo.2023.170988

Optik

2023

DOI: 10.1016/j.ijleo.2023.170988

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Enhanced entanglement and quantum teleportation of two-mode squeezed vacuum state via multistage non-Gaussian operations

Trương Minh Đức

Trần Quang Đạt

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Cited by 4 publications

References 53 publications

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Hybrid bidirectional quantum communication protocol of two single-qubit states under noisy channels with memory

Mandal,

Choudhury,

Samanta

2023

Quantum Inf Process

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Hybrid bidirectional quantum communication protocol of two single-qubit states under noisy channels with memory

Mandal,

Choudhury,

Samanta

2023

Quantum Inf Process

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Enhancement of teleportation average fidelity via photon addition operation

Minh Duc,

Quang Dat

2024

J. Phys.: Conf. Ser.

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In this paper, using the linear entropy criterion to quantify the degree of entanglement, we demonstrate that the addition of photons can enhance the entanglement degree of the photon-added two-mode squeezed vacuum states (PATMSVSs). Besides, the entanglement degree can approach ideal in case of squeezing parameter or number of added photons is high. When using PATMSVSs as entanglement resources to teleport a coherent state via a canonical protocol, the results show that the average fidelity of the quantum teleportation process is enhanced by the photon addition operation. The average fidelity increases as the number of photons added to the two-mode increases. In addition, we show that an enhancement in average fidelity can also be achieved by increasing the squeezing parameter of the TMSVS.

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Performance optimization of continuous-variable quantum teleportation with generalized photon-varying non-Gaussian operations

He,

Liu

2024

Phys. Rev. A

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Continuous variable quantum teleportation provides a path to the long-distance transmission of quantum states. Photon-varying non-Gaussian operations have been shown to improve the fidelity of quantum teleportation when integrated into the protocol. However, for a given type of non-Gaussian operation, the achievable fidelity varies with the parameters associated with the operation. Previous work only focused on particular settings of the parameters, over which an optimization was missing. The potential of such operations is not fully uncovered. Given a fixed non-Gaussian operation, the achievable fidelity also varies with input states. An operation that increases the fidelity for teleporting one class of states might do the contrary for other classes of states. A performance metric, upon which an operation is optimized, suitable for different input states, is also missing. In this work, we build a framework for photon-varying non-Gaussian operations for multimode states, upon which we propose a performance metric suitable for arbitrary teleportation input states. We then apply the new metric to evaluate different types of non-Gaussian operations. Starting from simple multiphoton photon subtraction and photon addition, we find that increasing the number of ancillary photons involved in the operation does not guarantee performance improvement. We then investigate a generalization of the operations mentioned above, finding that operations that approximate a particular form provide the best improvement. The results provided here will be valuable for real-world implementations of quantum teleportation networks and applications that harness the non-Gaussianity of quantum states. Published by the American Physical Society 2024

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Enhanced entanglement and quantum teleportation of two-mode squeezed vacuum state via multistage non-Gaussian operations

Cited by 4 publications

References 53 publications

Hybrid bidirectional quantum communication protocol of two single-qubit states under noisy channels with memory

Hybrid bidirectional quantum communication protocol of two single-qubit states under noisy channels with memory

Enhancement of teleportation average fidelity via photon addition operation

Performance optimization of continuous-variable quantum teleportation with generalized photon-varying non-Gaussian operations

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