Entanglement concentration for an arbitrary hybrid less-entangled state and W state using quantum dots and a microcavity coupled system

2012 ◽  
Vol 21 (11) ◽  
pp. 110305 ◽  
Author(s):  
Cong Cao ◽  
Chuan Wang ◽  
Ru Zhang
Keyword(s):  
Quantum Dots ◽  
Coupled System ◽  
W State ◽  
Entanglement Concentration ◽  
Entangled State

scholarly journals Efficient entanglement concentration for arbitrary single-photon multimode W state

2012 ◽  
Vol 30 (1) ◽  
pp. 71 ◽  
Author(s):  
Lan Zhou ◽  
Yu-Bo Sheng ◽  
Wei-Wen Cheng ◽  
Long-Yan Gong ◽  
Sheng-Mei Zhao
Keyword(s):  
Single Photon ◽  
W State ◽  
Entanglement Concentration

Photochromic control of a plasmon–quantum dots coupled system

Nanoscale ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 258-265 ◽  
Author(s):  
Gwénaëlle Lamri ◽  
Artur Movsesyan ◽  
Edite Figueiras ◽  
Jana B. Nieder ◽  
Jean Aubard ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Light Emission ◽  
Coupled System ◽  
System P

The enhancement and the control of quantum dot (QD) light emission is a challenge for many applications.

Dynamic changes in multiple quantum dots-cavity coupled system

2014 ◽  
Vol 324 ◽  
pp. 172-177 ◽  
Author(s):  
Yiwei Peng ◽  
Zhongyuan Yu ◽  
Yumin Liu ◽  
Wen Zhang ◽  
Han Ye
Keyword(s):  
Quantum Dots ◽  
Coupled System ◽  
Multiple Quantum ◽  
Dynamic Changes

LINEAR OPTICAL PROTOCOL FOR GENERATION OF W STATE WITHIN A NETWORK

2010 ◽  
Vol 08 (07) ◽  
pp. 1199-1206 ◽  
Author(s):  
PEI-MIN LU ◽  
YAN XIA ◽  
JIE SONG ◽  
HE-SHAN SONG
Keyword(s):  
Single Photon ◽  
W State ◽  
Entangled State ◽  
Photon Polarization ◽  
Photon Detectors ◽  
Optical Elements ◽  
Classical Communication ◽  
Linear Optical ◽  
Linear Optical Elements

We demonstrate a linear optical protocol to generate W state in terms of optical elements within a network. The proposed setup involves simple linear optical elements, N-photon polarization entangled state, and conventional photon detectors that only distinguish the vacuum and nonvacuum Fock number states. We show that with local operations, single-photon measurement, and one way classical communication, the protocol can be successfully realized with a certain probability.

Entanglement witnesses of four-qubit tripartite separable quantum states

2021 ◽  
Author(s):  
Miao Xu ◽  
Wei-feng Zhou ◽  
Feng Chen ◽  
Lizhen Jiang ◽  
Xiao-yu Chen
Keyword(s):  
Necessary Conditions ◽  
Quantum Systems ◽  
Ghz State ◽  
W State ◽  
Necessary Condition ◽  
Entangled State ◽  
Separable State ◽  
Entanglement Witnesses ◽  
Qubit System ◽  
Bipartite Quantum Systems

Abstract A quantum entangled state is easily disturbed by noise and degenerates into a separable state. Comparing to the entanglement of bipartite quantum systems, less progresses have been made for the entanglement of multipartite quantum systems. For tripartite separability of a four-qubit system, we propose two entanglement witnesses, each of which corresponds to a necessary condition of tripartite separability. For the four-qubit GHZ state mixed with a W state and white noise, it is proved that the necessary conditions of tripartite separability are also sufficient at W state side.

Nonlocal entanglement concentration of separate nitrogen-vacancy centers coupling to microtoroidal resonators

2014 ◽  
Vol 14 (1&2) ◽  
pp. 107-121
Author(s):  
Chuan Wang ◽  
Yong Zhang ◽  
Ming Lei ◽  
Guang-sheng Jin ◽  
Hai-qiang Ma ◽  
...  
Keyword(s):  
Nitrogen Vacancy ◽  
Entanglement Concentration ◽  
Entangled State ◽  
Output Process ◽  
Parity Check ◽  
Input Output ◽  
Check Gate ◽  
Nitrogen Vacancy Centers ◽  
Microtoroidal Resonator ◽  
Nonlocal Entanglement

Here we propose two practical protocols to concentrate entanglement between separate nitrogen-vacancy (N-V) centers in less entangled state via coupling to microtoroidal resonators. We construct the parity check gate of the N-V center and microtoroidal resonator systems via the interaction with the ancillary photon input-output process near the microtoroidal resonators. Thus the parity of the N-V center state can be readout by the measurement on the ancillary photon. Then we introduce the parity check operations to entanglement concentration protocols. Considering current techniques, we also discuss the feasibility of our proposal and its experimental challenges.

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