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.

CONTINUOUS-VARIABLE QUANTUM TELEPORTATION OF MULTIPARTITE ENTANGLED COHERENT STATES

2011 ◽  
Vol 25 (08) ◽  
pp. 1135-1142 ◽  
Author(s):  
YONG SUN ◽  
BEN-JIN SUN ◽  
MEI-LI SHI ◽  
ZHONG-XIAO MAN ◽  
YUN-JIE XIA
Keyword(s):  
Quantum Teleportation ◽  
Optical Devices ◽  
Continuous Variable ◽  
Phase Shifters ◽  
Entangled State ◽  
Average Fidelity ◽  
Beam Splitters ◽  
Maximal Entanglement ◽  
Entangled Coherent State ◽  
Tripartite Entangled State

We investigate the problem of teleportation of tripartite entangled coherent state (ECS) using linear optical devices such as beam splitters, phase shifters, and two-mode number measurements. The scheme is based on the maximally four-partite ECS with bipartite maximal entanglement as the quantum channel to teleportation tripartite ECS. Our scheme is efficient in the sense that for mean number of photons equal to 2, the minimum of average fidelity (MAF) for teleportation an arbitrary tripartite entangled state is 1-2.3 × 10-7. We also generalize the tripartite scheme into multipartite case and calculate the MAF for the schemes in multipartite cases.

IMPROVING THE TELEPORTATION OF TRIPARTITE ENTANGLED COHERENT STATES IN CONTINUOUS VARIABLE

2009 ◽  
Vol 07 (01) ◽  
pp. 313-321 ◽  
Author(s):  
YONG SUN ◽  
BEN-JIN SUN ◽  
MEI-LI SHI ◽  
ZHONG-XIAO MAN ◽  
YUN-JIE XIA
Keyword(s):  
Coherent State ◽  
Continuous Variable ◽  
Phase Shifters ◽  
Entangled State ◽  
Quantum Channels ◽  
Average Fidelity ◽  
Beam Splitters ◽  
Entangled Coherent State ◽  
Tripartite Entangled State ◽  
Photo Detectors

We propose a feasible scheme for the quantum teleportation of tripartite entangled coherent state in terms of linear optical devices such as beam splitters, phase shifters and photo detectors. The scheme is based on the bipartite maximally entangled coherent state and the tripartite entangled coherent state with bipartite maximal entanglement as quantum channels. It shows that for an appreciable mean number of photons equal to 2, the total minimum of average fidelity for an arbitrary tripartite entangled state is 0.981684.

Photonic schemes of distribution and reconstruction of an entangled state from hybrid entanglement between polarization and time-bin via quantum dot

2022 ◽  
Author(s):  
Jino Heo ◽  
Seong Gon Choi
Keyword(s):  
Quantum Dot ◽  
Quantum Channel ◽  
Nonlinear Optical ◽  
Optical Devices ◽  
Entangled State ◽  
Experimental Conditions ◽  
Reliable Performance ◽  
Cavity System ◽  
Linear Optical ◽  
Noisy Quantum Channel

Abstract We propose photonic schemes for the distribution and reconstruction of a two-qubit entangled state using a hybrid entangled state under a noisy quantum channel. First, to generate a hybrid entangled state correlated with polarizations and time-bins, we employ a quantum dot (QD)-cavity system (nonlinear optical gate) and linear optical devices to implement controlled operation. These schemes can achieve the distribution and reconstruction of a two-qubit entangled state from hybrid entanglement by utilizing only linear optical devices without a QD-cavity system (i.e., a nonlinear optical device) for users who want to share an entangled state under a noisy quantum channel. For a feasible realization of the proposed schemes, we analyze the interaction between the photons and QD-cavity system and demonstrate the experimental conditions under which the reliable performance of the QD-cavity system is achieved.

Generation of cluster-type entangled coherent states using weak nonlinearities

2011 ◽  
Vol 11 (1&2) ◽  
pp. 124-141
Author(s):  
Nguyen B. An ◽  
Kisik Kim ◽  
Jaewan Kim
Keyword(s):  
Coherent States ◽  
Single Photon ◽  
Optical Devices ◽  
Phase Shifters ◽  
Intense Laser ◽  
Laser Beams ◽  
Beam Splitters ◽  
Photo Detectors ◽  
Cluster Type ◽  
Entangled Coherent States

We propose a scheme to generate a recently introduced type of entangled coherent states using realistic weak cross-Kerr nonlinearities and intense laser beams. An intense laser can be filtered to make a faint one to be used for production of a single photon which is necessary in our scheme. The optical devices used are conventional ones such as interferometer, mirrors, beam-splitters, phase-shifters and photo-detectors. We also provide a detailed analysis on the effects of possible imperfections and decoherence showing that our scheme is robust against such effects.

QUANTUM TELEPORTATION FROM LIGHT TO ATOMIC BOSE–EINSTEIN CONDENSATE

2010 ◽  
Vol 24 (10) ◽  
pp. 937-944 ◽  
Author(s):  
YU GUO ◽  
RONG-SHENG QU
Keyword(s):  
Coherent State ◽  
Quantum Teleportation ◽  
Coherent States ◽  
Einstein Condensate ◽  
Kerr Medium ◽  
Optical Scheme ◽  
Optical Elements ◽  
Beam Splitters ◽  
Bose Einstein Condensate ◽  
Bose Einstein

An optical scheme of the quantum teleportation of superposed coherent states from light pulse to the atoms in Bose–Einstein condensate in terms of optical elements is presented. Beam splitters, photodetectors, cross-Kerr medium, and coherent state sources are needed in this scheme. The probability of successful teleportation is also obtained.

scholarly journals Directionally-Unbiased Unitary Optical Devices in Discrete-Time Quantum Walks

Entropy ◽  
2019 ◽  
Vol 21 (9) ◽  
pp. 853 ◽  
Author(s):  
Shuto Osawa ◽  
David S. Simon ◽  
Alexander V. Sergienko
Keyword(s):  
Information Processing ◽  
Optical Networks ◽  
Beam Splitter ◽  
Quantum Walk ◽  
Optical Devices ◽  
Quantum Walks ◽  
Unitary Matrix ◽  
Directional Bias ◽  
Beam Splitters ◽  
Linear Optical

The optical beam splitter is a widely-used device in photonics-based quantum information processing. Specifically, linear optical networks demand large numbers of beam splitters for unitary matrix realization. This requirement comes from the beam splitter property that a photon cannot go back out of the input ports, which we call “directionally-biased”. Because of this property, higher dimensional information processing tasks suffer from rapid device resource growth when beam splitters are used in a feed-forward manner. Directionally-unbiased linear-optical devices have been introduced recently to eliminate the directional bias, greatly reducing the numbers of required beam splitters when implementing complicated tasks. Analysis of some originally directional optical devices and basic principles of their conversion into directionally-unbiased systems form the base of this paper. Photonic quantum walk implementations are investigated as a main application of the use of directionally-unbiased systems. Several quantum walk procedures executed on graph networks constructed using directionally-unbiased nodes are discussed. A significant savings in hardware and other required resources when compared with traditional directionally-biased beam-splitter-based optical networks is demonstrated.

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