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.

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 Bipartite quantum channels using multipartite cluster-type entangled coherent states

2010 ◽  
Vol 81 (4) ◽  
Author(s):  
P. P. Munhoz ◽  
J. A. Roversi ◽  
A. Vidiella-Barranco ◽  
F. L. Semião
Keyword(s):  
Coherent States ◽  
Quantum Channels ◽  
Cluster Type ◽  
Entangled Coherent States

Two-party QPC with polarization-entangled Bell states and the coherent states

2014 ◽  
Vol 14 (3&4) ◽  
pp. 236-254
Author(s):  
Xiao-Ming Xiu ◽  
Li Dong ◽  
Hong-Zhi Shen ◽  
Ya-Jun Gao ◽  
X. X. Yi
Keyword(s):  
Coherent States ◽  
Single Photon ◽  
The Other ◽  
Bell States ◽  
Third Party ◽  
Nonlinear Interactions ◽  
Analysis Method ◽  
Beam Splitters ◽  
Kerr Media ◽  
Einstein Podolsky Rosen

We propose a protocol of quantum privacy comparison with polarization-entangled Einstein-Podolsky-Rosen (Bell) states and the coherent states. One of two legitimate participants, Alice, prepares polarization-entangled Bell states and keeps one photon of each photon pair and sends the other photons to the third party, Charlie. Receiving the photons, Charlie performs single-photon transformation operations on them and then sends them to the other legitimate participant, Bob. Three participants adopt parity analysis method to check the distribution security of Bell states. Exploiting polarization beam splitters and nonlinear interactions mediated by the probe coherent states in Kerr media, Alice and Bob check the parities of their photons using the bases of $\{\ket H, \ket V\}$ or $\{\ket +, \ket -\}$. On the basis of the parity analysis outcomes and Charlie's publicized information, they can analyze the security of the distributed quantum channel. Confirming secure distribution of the shared Bell states, two participants perform respective parity measurements on the privacy photons and own photons of Bell states, and then send the results to Charlie. According to information provided by two legitimate participants and his single-qubit transformation operations, Charlie compares the privacy information of Alice and Bob and publicizes the conclusion.

Generation of Cluster-Type Entangled Coherent States via Cross-Kerr Nonlinearity

2008 ◽  
Vol 25 (3) ◽  
pp. 839-842 ◽  
Author(s):  
Wang Wen-Feng ◽  
Sun Xin-Yuan ◽  
Luo Xiao-Bing
Keyword(s):  
Coherent States ◽  
Kerr Nonlinearity ◽  
Cluster Type ◽  
Entangled Coherent States

Generation of Four-Mode Cluster-Type Entangled Coherent States in Free-Traveling Optical Fields

2011 ◽  
Vol 55 (3) ◽  
pp. 426-430 ◽  
Author(s):  
Dai-Guo He ◽  
Yu-Li Dong ◽  
Jian-Xing Fang ◽  
Li Qian ◽  
Jie Hu
Keyword(s):  
Coherent States ◽  
Optical Fields ◽  
Cluster Type ◽  
Entangled Coherent States

scholarly journals Cluster-type entangled coherent states

2008 ◽  
Vol 372 (20) ◽  
pp. 3580-3585 ◽  
Author(s):  
P.P. Munhoz ◽  
F.L. Semião ◽  
A. Vidiella-Barranco ◽  
J.A. Roversi
Keyword(s):  
Coherent States ◽  
Cluster Type ◽  
Entangled Coherent States

Cluster-type entangled coherent states generation

2008 ◽  
Author(s):  
F. C. Lourenço ◽  
A. Vidiella-Barranco ◽  
Niklaus Ursus Wetter ◽  
Jaime Frejlich
Keyword(s):  
Coherent States ◽  
Cluster Type ◽  
Entangled Coherent States

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.

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.

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