scholarly journals Controlled Quantum Teleportation of Superposed Coherent State Using GHZ Entangled Coherent State

2019 ◽  
Vol 58 (10) ◽  
pp. 3342-3351 ◽  
Author(s):  
Ravi Kamal Pandey ◽  
Ranjana Prakash ◽  
Hari Prakash
Keyword(s):  
Coherent State ◽  
Quantum Teleportation ◽  
Controlled Quantum Teleportation ◽  
Entangled Coherent State

Quantum teleportation of a tripartite entangled coherent state

2021 ◽  
Author(s):  
Shivani A. Kumar
Keyword(s):  
Coherent State ◽  
Quantum Channel ◽  
Quantum Teleportation ◽  
Optical Devices ◽  
Phase Shifters ◽  
Quantum Model ◽  
Beam Splitters ◽  
Entangled Coherent State ◽  
Linear Optical

The present work proposes a scheme to teleport a tripartite coherent state using an unparalleled four-component state as a quantum channel. The scheme involves linear optical devices like beam splitters and phase shifters. It is shown that, even by taking an uncompromising quantum model, almost a complete teleportation can be achieved with an impressive number of photons. It is also shown that the teleportation fails only if zero photons are found in all the three output modes or zero in two output modes and a nonzero even/odd photon in one mode. However, the probability of getting these output modes is almost negligible.

TELEPORTATION OF THE MULTIPARTITE ENTANGLED STATES IN CONTINUOUS VARIABLE

2009 ◽  
Vol 07 (02) ◽  
pp. 505-515
Author(s):  
MIAN QIAO ◽  
YONG SUN ◽  
YUN JIE XIA
Keyword(s):  
Coherent State ◽  
Quantum Teleportation ◽  
Optical Devices ◽  
Continuous Variable ◽  
Phase Shifters ◽  
Entangled States ◽  
Average Fidelity ◽  
Beam Splitters ◽  
Entangled Coherent State ◽  
Photo Detectors

We propose a quantum teleportation scheme for tripartite entangled coherent state (ECS) in continuous variable by adopting disentanglement method. Our scheme is feasible and economical in the sense that we only need linear optical devices such as beam splitters, phase shifters and photo detectors and employ bipartite maximally ECS as quantum channel. We also generalize the tripartite scheme into multipartite case and calculate the minimum average fidelity for the schemes in tripartite and multipartite cases.

scholarly journals Super-resolving quantum lidar: entangled coherent-state sources with binary-outcome photon counting measurement suffice to beat the shot-noise limit

2016 ◽  
Vol 24 (5) ◽  
pp. 5045 ◽  
Author(s):  
Qiang Wang ◽  
Lili Hao ◽  
Yong Zhang ◽  
Lu Xu ◽  
Chenghua Yang ◽  
...  
Keyword(s):  
Coherent State ◽  
Shot Noise ◽  
Photon Counting ◽  
Binary Outcome ◽  
Entangled Coherent State ◽  
Noise Limit ◽  
Shot Noise Limit

Entanglement and nonlocality for a mixture of a pair-coherent state

2003 ◽  
Vol 3 (2) ◽  
pp. 106-115
Author(s):  
S. Mancini ◽  
P. Tombesi
Keyword(s):  
Coherent State ◽  
Quantum Teleportation ◽  
Single Photon ◽  
Continuous Variables ◽  
Bell’S Inequalities ◽  
Nonclassical Properties ◽  
Pair Coherent State ◽  
Photon Loss ◽  
Phase Randomization ◽  
Degree Of Entanglement

We consider a bipartite continuous variables quantum mixture coming from phase randomization of a pair-coherent state. We study the nonclassical properties of such a mixture. In particular, we quantify its degree of entanglement, then we show possible violations of Bell's inequalities. We also consider the use of this mixture in quantum teleportation. Finally, we compare this mixture with that obtained from a pair-coherent state by single photon loss.

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

2021 ◽  
pp. 2150249
Author(s):  
Vikram Verma
Keyword(s):  
Quantum Channel ◽  
Quantum Teleportation ◽  
Quantum States ◽  
Entangled State ◽  
Controlled Quantum Teleportation ◽  
Intrinsic Efficiency ◽  
Qubit States ◽  
Generalized 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.

CONTROLLED TELEPORTATION OF ELECTRON SPIN STATE IN QUANTUM DOT VIA SINGLE PHOTON

2008 ◽  
Vol 06 (03) ◽  
pp. 553-560
Author(s):  
YAN-WEI WANG ◽  
MING-FENG WANG ◽  
YI-ZHUANG ZHENG
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Electron Spin ◽  
Spin State ◽  
Faraday Rotation ◽  
Quantum Teleportation ◽  
Single Photon ◽  
Controlled Teleportation ◽  
Controlled Quantum Teleportation ◽  
Qubit System

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.

Controlled Quantum Teleportation Through Noisy GHZ Channel

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

A noise immunity controlled quantum teleportation protocol

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