Routing Strategies for High-Fidelity, Multiplexed Quantum Networks

AbstractWe introduce a method for high-fidelity quantum state transduction between a superconducting microwave qubit and the ground state spin system of a solid-state artificial atom, mediated via an acoustic bus connected by piezoelectric transducers. Applied to present-day experimental parameters for superconducting circuit qubits and diamond silicon-vacancy centers in an optimized phononic cavity, we estimate quantum state transduction with fidelity exceeding 99% at a MHz-scale bandwidth. By combining the complementary strengths of superconducting circuit quantum computing and artificial atoms, the hybrid architecture provides high-fidelity qubit gates with long-lived quantum memory, high-fidelity measurement, large qubit number, reconfigurable qubit connectivity, and high-fidelity state and gate teleportation through optical quantum networks.

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Hybrid Quantum Networks for High-Fidelity Entanglement Distribution

Conference on Lasers and Electro-Optics ◽

10.1364/cleo_qels.2020.fth3d.5 ◽

2020 ◽

Author(s):

Yuan Lee ◽

Eric Bersin ◽

Axel Dahlberg ◽

Stephanie Wehner ◽

Dirk Englund

Keyword(s):

High Fidelity ◽

Quantum Networks ◽

Entanglement Distribution

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Nanophotonic rare-earth quantum memory with optically controlled retrieval

Science ◽

10.1126/science.aan5959 ◽

2017 ◽

Vol 357 (6358) ◽

pp. 1392-1395 ◽

Cited By ~ 79

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.

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Efficient Conditional Preparation of High-Fidelity Single Photon States for Fiber-Optic Quantum Networks

Physical Review Letters ◽

10.1103/physrevlett.93.093601 ◽

2004 ◽

Vol 93 (9) ◽

Cited By ~ 117

Author(s):

Alfred B. U’Ren ◽

Christine Silberhorn ◽

Konrad Banaszek ◽

Ian A. Walmsley

Keyword(s):

Fiber Optic ◽

Single Photon ◽

High Fidelity ◽

Quantum Networks ◽

Photon States

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Deterministic spin-photon entanglement from a trapped ion in a fiber Fabry–Perot cavity

npj Quantum Information ◽

10.1038/s41534-020-00338-2 ◽

2021 ◽

Vol 7 (1) ◽

Author(s):

Pascal Kobel ◽

Moritz Breyer ◽

Michael Köhl

Keyword(s):

Secure Communication ◽

Success Probability ◽

High Fidelity ◽

Single Shot ◽

Quantum Network ◽

Quantum Networks ◽

Network Nodes ◽

Trapped Ion ◽

Fabry Perot ◽

Resonator Mode

AbstractThe development of efficient network nodes is a key element for the realization of quantum networks which promise great capabilities as distributed quantum computing or provable secure communication. We report the realization of a quantum network node using a trapped ion inside a fiber-based Fabry–Perot cavity. We show the generation of deterministic entanglement at a high fidelity of 90.1(17)% between a trapped Yb ion and a photon emitted into the resonator mode. We achieve a success probability for generation and detection of entanglement for a single shot of 2.5 × 10−3 resulting in 62 Hz entanglement rate.

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Fidelity analysis of cyclic three-level system-based quantum routing

International Journal of Modern Physics B ◽

10.1142/s0217979217501909 ◽

2017 ◽

Vol 31 (27) ◽

pp. 1750190 ◽

Cited By ~ 1

Author(s):

Hua Lu ◽

Guo-An Yan

Keyword(s):

Quantum State ◽

Quantum Channel ◽

High Fidelity ◽

Level System ◽

Quantum Networks ◽

Maximum Value ◽

Quantum Router

A quantum router can guide information from one quantum channel to another; thus, it has an increasingly important role in complex quantum networks. Here, we verify that the quantum router proposed by [L. Zhou et al., Phys. Rev. Lett 111, 103604 (2013)] achieves quantum-state high fidelity. When the transition strengths match [Formula: see text], the fidelity of the atom decreases from the maximum value after a period of time and then rises to a maximum value of 1; if the transition strengths do not match, the fidelity will not be able to reach 1.

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

Journal of Personnel Psychology ◽

10.1027/1866-5888/a000211 ◽

2018 ◽

Vol 17 (3) ◽

pp. 155-160 ◽

Cited By ~ 3

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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