Synchronized preparation of bi- and tri-qubit entanglement with nitrogen-vacancy centers coupled to microtoroidal resonators

2019 ◽  
Vol 17 (02) ◽  
pp. 1950014
Author(s):  
Tai-An Wang ◽  
Shuai Feng ◽  
Yong Zhang
Keyword(s):  
Quantum Information Processing ◽  
Nitrogen Vacancy ◽  
Whispering Gallery Modes ◽  
Output Process ◽  
Input Output ◽  
Whispering Gallery ◽  
W States ◽  
Nitrogen Vacancy Centers ◽  
Photon Pulse ◽  
Efficient Scheme

We research the input–output process with nitrogen-vacancy (NV) centers fixed on the surface of micro-toroidal resonators (MTRs) with whispering-gallery modes (WGMs) and then present an efficient scheme for the synchronized generation of Bell and W states. In our scheme, entanglement can be prepared with the assistance of the polarized photon pulse and electron spin state of NV center. The analysis of the efficiency shows that our scheme is feasible with the current technology, which can be further used for quantum information processing.

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.

scholarly journals Generation of Greenberger-Horne-Zeilinger state of distant diamond nitrogen-vacancy centers via nanocavity input-output process

2012 ◽  
Vol 20 (15) ◽  
pp. 16902 ◽  
Author(s):  
Anshou Zheng ◽  
Jiahua Li ◽  
Rong Yu ◽  
Xin-You Lü ◽  
Ying Wu
Keyword(s):  
Nitrogen Vacancy ◽  
Output Process ◽  
Input Output ◽  
Nitrogen Vacancy Centers

scholarly journals Quantum reference beacon–guided superresolution optical focusing in complex media

Science ◽  
2019 ◽  
Vol 363 (6426) ◽  
pp. 528-531 ◽  
Author(s):  
Donggyu Kim ◽  
Dirk R. Englund
Keyword(s):  
Quantum Information ◽  
Quantum Information Processing ◽  
Optical Excitation ◽  
Optical Scattering ◽  
Nitrogen Vacancy ◽  
Complex Media ◽  
Deep Tissue ◽  
Nitrogen Vacancy Centers ◽  
Wavefront Shaping ◽  
Optical Focusing

Optical scattering is generally considered to be a nuisance of microscopy that limits imaging depth and spatial resolution. Wavefront shaping techniques enable optical imaging at unprecedented depth, but attaining superresolution within complex media remains a challenge. We used a quantum reference beacon (QRB), consisting of solid-state quantum emitters with spin-dependent fluorescence, to provide subwavelength guidestar feedback for wavefront shaping to achieve a superresolution optical focus. We implemented the QRB-guided imaging with nitrogen-vacancy centers in diamond nanocrystals, which enable optical focusing with a subdiffraction resolution below 186 nanometers (less than half the wavelength). QRB-assisted wavefront-shaping should find use in a range of applications, including deep-tissue quantum enhanced sensing and individual optical excitation of magnetically coupled spin ensembles for applications in quantum information processing.

scholarly journals Entanglement dynamics for three nitrogen-vacancy centers coupled to a whispering-gallery-mode microcavity

2015 ◽  
Vol 23 (11) ◽  
pp. 13734 ◽  
Author(s):  
Wanlu Song ◽  
Wanli Yang ◽  
Qiong Chen ◽  
Qizhe Hou ◽  
Mang Feng
Keyword(s):  
Whispering Gallery Mode ◽  
Nitrogen Vacancy ◽  
Entanglement Dynamics ◽  
Whispering Gallery ◽  
Nitrogen Vacancy Centers
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