scholarly journals Linear, Bidirectional and Circular Controlled Quantum Teleportation and Quantum State Sharing using a Seven Qubit Genuinely Entangled State

2020 ◽  
Author(s):  
Mrittunjoy Guha Majumdar
Keyword(s):  
Quantum State ◽  
Quantum Teleportation ◽  
Controlled Teleportation ◽  
Entangled State ◽  
Multipartite Entanglement ◽  
Quantum State Sharing ◽  
Controlled Quantum Teleportation ◽  
Qubit States ◽  
Resource State

Multipartite entanglement is a resource for application in disparate protocols, of computing, communication and cryptography. In this paper, generation, characterisation and application of a genuine genuinely entangled seven-qubit resource state is studied. Theoretical schemes for quantum teleportation of arbitrary one, two and three qubits states, bidirectional teleportation of arbitrary two qubit states and probabilistic circular controlled teleportation as well as three schemes for undertaking tripartite quantum state sharing are presented.

scholarly journals Generation and Application of Nested Entanglement in Matryoshka Quantum Resource-States

2020 ◽  
Author(s):  
Mrittunjoy Guha Majumdar
Keyword(s):  
Quantum Teleportation ◽  
Quantum Information Processing ◽  
Quantum States ◽  
Bell States ◽  
Controlled Teleportation ◽  
Multipartite Entanglement ◽  
Spin Interaction ◽  
State Generation ◽  
Qubit States ◽  
Resource State

Multipartite entanglement is a resource for application in disparate protocols, of computing, communication and cryptography. Nested entanglement provides resource-states for quantum information processing. In this paper, Matryoshka quantum resource-states, which contain nested entanglement patterns, has been studied. A novel scheme for the generation of such quantum states has been proposed using an anisotropic XY spin-spin interaction-based model. The application of the Matryoshka GHZ-Bell states for n-qubit teleportation is reviewed and an extension to more general Matryoshka ExhS-Bell states is posited. An example of Matryoshka ExhS-Bell states is given in the form of the genuinely entangled seven-qubit Xin-Wei Zha state. Generation, characterisation and application of this seven-qubit resource state in theoretical schemes for quantum teleportation of arbitrary one, two and three qubits states, bidirectional teleportation of arbitrary two qubit states and probabilistic circular controlled teleportation are presented.

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.

scholarly journals Deterministic quantum teleportation through fiber channels

2018 ◽  
Vol 4 (10) ◽  
pp. eaas9401 ◽  
Author(s):  
Meiru Huo ◽  
Jiliang Qin ◽  
Jialin Cheng ◽  
Zhihui Yan ◽  
Zhongzhong Qin ◽  
...  
Keyword(s):  
Communication Networks ◽  
Quantum State ◽  
Optical Fibers ◽  
Quantum Teleportation ◽  
Continuous Variable ◽  
Entangled State ◽  
Optical Modes ◽  
Unknown Quantum State ◽  
Einstein Podolsky Rosen ◽  
Fiber Channels

Quantum teleportation, which is the transfer of an unknown quantum state from one station to another over a certain distance with the help of nonlocal entanglement shared by a sender and a receiver, has been widely used as a fundamental element in quantum communication and quantum computation. Optical fibers are crucial information channels, but teleportation of continuous variable optical modes through fibers has not been realized so far. Here, we experimentally demonstrate deterministic quantum teleportation of an optical coherent state through fiber channels. Two sub-modes of an Einstein-Podolsky-Rosen entangled state are distributed to a sender and a receiver through a 3.0-km fiber, which acts as a quantum resource. The deterministic teleportation of optical modes over a fiber channel of 6.0 km is realized. A fidelity of 0.62 ± 0.03 is achieved for the retrieved quantum state, which breaks through the classical limit of1/2. Our work provides a feasible scheme to implement deterministic quantum teleportation in communication networks.

Quantum state sharing of an arbitrary m-particle state using Einstein–Podolsky–Rosen pairs and application in quantum voting

2021 ◽  
pp. 2150151
Author(s):  
Comfort Sekga ◽  
Mhlambululi Mafu
Keyword(s):  
Quantum State ◽  
Single Particle ◽  
Single Particle State ◽  
Electronic Voting ◽  
Particle State ◽  
Quantum State Sharing ◽  
Original State ◽  
Einstein Podolsky Rosen ◽  
Qubit States ◽  
Quantum Voting

In this paper, we propose a scheme where Alice shares an arbitrary m-particle unknown state with her agents, Bob and Charlie. Alice starts by distributing 2m Einstein–Podolsky–Rosen pairs with her agents and performs m joint three-particle Greenberger–Horne–Zeilinger state measurements on her particles. Bob, who acts as the controller, performs a product measurement [Formula: see text] on his m qubit states while Charlie retrieves the original state by performing unitary operations on his m particles. Subsequently, we demonstrate our proposed scheme’s feasibility by applying it in electronic voting by sharing an arbitrary single-particle state.

Controlled Quantum Teleportation of a One-Particle Unknown State via a Three-Particle Entangled State

2007 ◽  
Vol 48 (2) ◽  
pp. 261-263 ◽  
Author(s):  
Xiu Xiao-Ming ◽  
Dong Li ◽  
Gao Ya-Jun ◽  
Chi Feng
Keyword(s):  
Quantum Teleportation ◽  
Entangled State ◽  
Controlled Quantum Teleportation ◽  
Unknown State

Experimental realization of quantum controlled teleportation of arbitrary two-qubit state via a five-qubit entangled state

2021 ◽  
Author(s):  
Xiao-Fang Liu ◽  
Dong-Fen Li ◽  
Yun-Dan Zheng ◽  
Xiao-Long Yang ◽  
Jie Zhou ◽  
...  
Keyword(s):  
Density Matrix ◽  
Quantum State ◽  
Bell State ◽  
Third Party ◽  
Controlled Teleportation ◽  
Entangled State ◽  
Entanglement Measure ◽  
Experimental Realization ◽  
Operation Process ◽  
Photonic States

Abstract Quantum controlled teleportation is the transmission of the quantum state under the supervision of a third party. This paper presents a theoretical and experimental combination of an arbitrary two-qubit quantum controlled teleportation scheme. In the scheme, the sender Alice only needs to perform two Bell state measurements, and the receiver Bob can perform the appropriate unitary operation to reconstruct arbitrary two-qubit states under the control of the supervisor Charlie. We verified the operation process of the scheme on the IBM Quantum Experience platform and further checked the accuracy of the transmitted quantum state by performing quantum state tomography. Meanwhile, good fidelity is obtained by calculating the theoretical density matrix and the experimental density matrix. We also introduced a sequence of photonic states to analyze the possible intercept-replace-resend, intercept-measure-resend, and entanglement-measure-resend attacks on this scheme. The results proved that our scheme is highly secure.

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