scholarly journals High-fidelity polarization storage in a gigahertz bandwidth quantum memory

2012 ◽  
Vol 45 (12) ◽  
pp. 124008 ◽  
Author(s):  
D G England ◽  
P S Michelberger ◽  
T F M Champion ◽  
K F Reim ◽  
K C Lee ◽  
...  
Keyword(s):  
Quantum Memory ◽  
High Fidelity

Nanophotonic rare-earth quantum memory with optically controlled retrieval

Science ◽  
2017 ◽  
Vol 357 (6358) ◽  
pp. 1392-1395 ◽  
Author(s):  
Tian Zhong ◽  
Jonathan M. Kindem ◽  
John G. Bartholomew ◽  
Jake Rochman ◽  
Ioana Craiciu ◽  
...  
Keyword(s):  
Frequency Comb ◽  
Essential Elements ◽  
Quantum Memory ◽  
High Fidelity ◽  
Long Distance ◽  
Quantum Networks ◽  
Network Nodes ◽  
Readout Time ◽  
On Chip ◽  
Photon Source

Optical quantum memories are essential elements in quantum networks for long-distance distribution of quantum entanglement. Scalable development of quantum network nodes requires on-chip qubit storage functionality with control of the readout time. We demonstrate a high-fidelity nanophotonic quantum memory based on a mesoscopic neodymium ensemble coupled to a photonic crystal cavity. The nanocavity enables >95% spin polarization for efficient initialization of the atomic frequency comb memory and time bin–selective readout through an enhanced optical Stark shift of the comb frequencies. Our solid-state memory is integrable with other chip-scale photon source and detector devices for multiplexed quantum and classical information processing at the network nodes.

scholarly journals Designing a practical high-fidelity long-time quantum memory

2013 ◽  
Vol 4 (1) ◽  
Author(s):  
Kaveh Khodjasteh ◽  
Jarrah Sastrawan ◽  
David Hayes ◽  
Todd J. Green ◽  
Michael J. Biercuk ◽  
...  
Keyword(s):  
Quantum Memory ◽  
High Fidelity ◽  
Time Quantum ◽  
Long Time

scholarly journals High-fidelity quantum memory utilizing inhomogeneous nuclear polarization in a quantum dot

2014 ◽  
Vol 90 (23) ◽  
Author(s):  
Wenkui Ding ◽  
Anqi Shi ◽  
J. Q. You ◽  
Wenxian Zhang
Keyword(s):  
Quantum Dot ◽  
Nuclear Polarization ◽  
Quantum Memory ◽  
High Fidelity

scholarly journals Long Lifetime and High-Fidelity Quantum Memory of Photonic Polarization Qubit by Lifting Zeeman Degeneracy

2013 ◽  
Vol 111 (24) ◽  
Author(s):  
Zhongxiao Xu ◽  
Yuelong Wu ◽  
Long Tian ◽  
Lirong Chen ◽  
Zhiying Zhang ◽  
...  
Keyword(s):  
Quantum Memory ◽  
High Fidelity ◽  
Long Lifetime

scholarly journals High-fidelity quantum gates for OAM single qudits on quantum memory

2022 ◽  
Vol 19 (2) ◽  
pp. 025202
Author(s):  
E A Vashukevich ◽  
E N Bashmakova ◽  
T Yu Golubeva ◽  
Yu M Golubev
Keyword(s):  
Quantum Systems ◽  
Quantum Memory ◽  
Quantum Gates ◽  
High Fidelity ◽  
Optimal Conditions ◽  
Memory Scheme ◽  
Different Dimensions ◽  
Single Qudit ◽  
High Level ◽  
Promising Avenue

Abstract The application of high-dimensional quantum systems (qudits) in quantum computing and communications seems to be a promising avenue due to the possibility of increasing the amount of information encoded in one physical carrier. In this work, we propose a method for implementing single-qudit gates for qudits based on light modes with orbital angular momentum (OAM). Method for logical qudits encoding, which ensures the quasi-cyclicity of operations, is introduced. Based on the protocol for converting the OAM of light in the Raman quantum memory scheme (Vashukevich et al 2020 Phys. Rev. A 101 033830), we show that the considered gates provide an extremely high level of fidelity of single-qudit transformations. We also compare quantum gates’ properties for systems of different dimensions and find the optimal conditions for carrying out transformations in the protocol under consideration.

Using the Theory of Planned Behavior to Predict Faking in Selection Exercises Varying in Fidelity

2018 ◽  
Vol 17 (3) ◽  
pp. 155-160 ◽  
Author(s):  
Daniel Dürr ◽  
Ute-Christine Klehe
Keyword(s):  
Theory Of Planned Behavior ◽  
Planned Behavior ◽  
Predictive Validity ◽  
Group Discussion ◽  
Role Play ◽  
Selection Procedure ◽  
High Fidelity ◽  
Selection Research ◽  
Play Group

Abstract. Faking has been a concern in selection research for many years. Many studies have examined faking in questionnaires while far less is known about faking in selection exercises with higher fidelity. This study applies the theory of planned behavior (TPB; Ajzen, 1991 ) to low- (interviews) and high-fidelity (role play, group discussion) exercises, testing whether the TPB predicts reported faking behavior. Data from a mock selection procedure suggests that candidates do report to fake in low- and high-fidelity exercises. Additionally, the TPB showed good predictive validity for faking in a low-fidelity exercise, yet not for faking in high-fidelity exercises.

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