Controlled quantum teleportation of an unknown single-qutrit state in noisy channels with memory

2021 ◽  
Author(s):  
Shexiang Jiang ◽  
Bao Zhao ◽  
Xingzhu Liang
2021 ◽  
pp. 2150249
Author(s):  
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.


2008 ◽  
Vol 06 (03) ◽  
pp. 553-560
Author(s):  
YAN-WEI WANG ◽  
MING-FENG WANG ◽  
YI-ZHUANG ZHENG

A controlled quantum teleportation scheme of electron spin state in a quantum dot is proposed. With the entanglement generating through the interaction between the quantum dots in microcavities and a single photon, the controlled teleportation can be implemented using Faraday rotation and single photon measurements. The scheme can be easily generalized to multi-qubit system.


2010 ◽  
Vol 53 (3) ◽  
pp. 489-495 ◽  
Author(s):  
Miao Chun ◽  
Yang Ming ◽  
Cao Zhuo-Liang

2016 ◽  
Vol 15 (11) ◽  
pp. 4819-4837 ◽  
Author(s):  
Dong-fen Li ◽  
Rui-jin Wang ◽  
Feng-li Zhang ◽  
Edward Baagyere ◽  
Zhen Qin ◽  
...  

2004 ◽  
Vol 59 (9) ◽  
pp. 597-601 ◽  
Author(s):  
T. Gao

A theoretical scheme for controlled and secure direct communication is proposed. The communication is based on GHZ state and controlled quantum teleportation. After insuring the security of the quantum channel (a set of qubits in the GHZ state), Alice encodes the secret message directly on a sequence of particle states in the GHZ state and transmits them to Bob, supervised by Charlie using controlled quantum teleportation. Bob can read out the encoded messages directly by the measurement on his qubits. In this scheme, the controlled quantum teleportation transmits Alice’s message without revealing any information to a potential eavesdropper. Because there is not a transmission of the qubit carrying the secret messages between Alice and Bob in the public channel, it is completely secure for controlled and direct secret communication if a perfect quantum channel is used. The feature of this scheme is that the communication between two sides depends on the agreement of a third side.


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