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Optical and Quantum Electronics

Multi-directional controlled quantum teleportation by using nine-qubit entangled state as a single quantum channel

Nikhita Singh, Nidhi Singh, Ankita Pathak, Vikram Verma, Ravi Shankar Singh

Published Aug 11, 2023• 15 citations
Publisher
DOI
10.1007/s11082-023-05198-6

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In this paper, we propose a four-directional controlled quantum teleportation (CQT) by using a nine-qubit entangled state as the quantum channel. In 2020, a scheme for four-directional controlled quantum teleportation by using a 10-qubit state as the quantum resource had been proposed in X. W. Zha and K. Li [Mod. Phys. Lett. B 34, 2050412 (2020)] in which the controller has no control over the two teleportation processes. In this study, it is also shown that two receivers cannot reconstruct the original state sent from the respective senders and hence the teleportation processes cannot be completed in the previous scheme. However, these problems have been resolved in our proposed scheme in which the controller has control over all the teleportation processes and none of the receivers can reconstruct the original state sent from the respective senders without the permission of the controller. Thus, our proposed scheme reduces the consumption of quantum resource and is more secure and successful as compared to the previous scheme.

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Symmetric and asymmetric cyclic controlled quantum teleportation via nine-qubit entangled state

Vikram Verma

In this paper, by utilizing a nine-qubit entangled state as a quantum channel, we propose new schemes for symmetric and asymmetric cyclic controlled quantum teleportation (CYCQT). In our proposed schemes, four participants Alice, Bob, Charlie and David teleport their unknown quantum states cyclically among themselves with the help of a controller Eve. No participants can reconstruct the original states sent from the respective senders without the permission of the controller. Also, by considering same nine-qubit entangled state as a quantum channel, we propose a generalized scheme for CYCQT of multi-qubit states. In contrast to the previous CYCQT schemes involving three communicators and a controller, there are four communicators and a controller in the proposed schemes. Also, compared with previous CYCQT schemes, our proposed CYCQT schemes require less consumption of quantum resource and the intrinsic efficiency of the generalized scheme increases with the increase of number of qubits in the information states.

Modern Physics Letters B•Apr 20, 2021•8 citations
In this paper, we propose a four-directional controlled quantum teleportation (CQT) by using a nine-qubit entangled state as the quantum channel. In 2020, a scheme for four-directional controlled quantum teleportation by using a 10-qubit state as the quantum resource had been proposed in X. W. Zha and K. Li [Mod. Phys. Lett. B 34, 2050412 (2020)] in which the controller has no control over the two teleportation processes. In this study, it is also shown that two receivers cannot reconstruct the original state sent from the respective senders and hence the teleportation processes cannot be completed in the previous scheme. However, these problems have been resolved in our proposed scheme in which the controller has control over all the teleportation processes and none of the receivers can reconstruct the original state sent from the respective senders without the permission of the controller. Thus, our proposed scheme reduces the consumption of quantum resource and is more secure and successful as compared to the previous scheme.
In this paper, by utilizing a nine-qubit entangled state as a quantum channel, we propose new schemes for symmetric and asymmetric cyclic controlled quantum teleportation (CYCQT). In our proposed schemes, four participants Alice, Bob, Charlie and David teleport their unknown quantum states cyclically among themselves with the help of a controller Eve. No participants can reconstruct the original states sent from the respective senders without the permission of the controller. Also, by considering same nine-qubit entangled state as a quantum channel, we propose a generalized scheme for CYCQT of multi-qubit states. In contrast to the previous CYCQT schemes involving three communicators and a controller, there are four communicators and a controller in the proposed schemes. Also, compared with previous CYCQT schemes, our proposed CYCQT schemes require less consumption of quantum resource and the intrinsic efficiency of the generalized scheme increases with the increase of number of qubits in the information states.