Fragmentation-aware Entanglement Routing for Quantum Networks

2021 ◽  
pp. 1-1
Author(s):  
Shengyu Zhang ◽  
Shouqian Shi ◽  
Chen Qian ◽  
Kwan L. Yeung
Keyword(s):  
Quantum Networks

scholarly journals A phononic interface between a superconducting quantum processor and quantum networked spin memories

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Tomáš Neuman ◽  
Matt Eichenfield ◽  
Matthew E. Trusheim ◽  
Lisa Hackett ◽  
Prineha Narang ◽  
...  
Keyword(s):  
Quantum State ◽  
Piezoelectric Transducers ◽  
High Fidelity ◽  
Hybrid Architecture ◽  
Quantum Networks ◽  
Superconducting Circuit ◽  
Artificial Atom ◽  
Experimental Parameters ◽  
Quantum Processor ◽  
State Spin

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.

scholarly journals Relaxation to equilibrium in controlled-not quantum networks

2021 ◽  
Vol 103 (4) ◽  
Author(s):  
J. Novotný ◽  
A. Mariano ◽  
S. Pascazio ◽  
A. Scardicchio ◽  
I. Jex
Keyword(s):  
Quantum Networks ◽  
Relaxation To Equilibrium

scholarly journals Quantum dots as potential sources of strongly entangled photons: Perspectives and challenges for applications in quantum networks

2021 ◽  
Vol 118 (10) ◽  
pp. 100502
Author(s):  
Christian Schimpf ◽  
Marcus Reindl ◽  
Francesco Basso Basset ◽  
Klaus D. Jöns ◽  
Rinaldo Trotta ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Entangled Photons ◽  
Quantum Networks ◽  
Potential Sources

scholarly journals Coherent router for quantum networks with superconducting qubits

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
K. S. Christensen ◽  
S. E. Rasmussen ◽  
D. Petrosyan ◽  
N. T. Zinner
Keyword(s):  
Superconducting Qubits ◽  
Quantum Networks

scholarly journals A nonlocal game for witnessing quantum networks

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Ming-Xing Luo
Keyword(s):  
Computational Complexity ◽  
Main Idea ◽  
Bell Inequalities ◽  
Theoretical Computer Science ◽  
Graph Representation ◽  
Necessary Condition ◽  
Quantum Networks ◽  
Theoretical Computer ◽  
Sufficient And Necessary Condition ◽  
Unified Method

Abstract Nonlocal game as a witness of the nonlocality of entanglement is of fundamental importance in various fields. The well-known nonlocal games or equivalent linear Bell inequalities are only useful for Bell networks consisting of single entanglement. Our goal in this paper is to propose a unified method for constructing cooperating games in network scenarios. We propose an efficient method to construct multipartite nonlocal games from any graphs. The main idea is the graph representation of entanglement-based quantum networks. We further specify these graphic games with quantum advantages by providing a simple sufficient and necessary condition. The graphic games imply a linear Bell testing of the nonlocality of general quantum networks consisting of EPR states. It also allows generating new instances going beyond CHSH game. These results have interesting applications in quantum networks, Bell theory, computational complexity, and theoretical computer science.

scholarly journals Cavity-based quantum networks with single atoms and optical photons

2015 ◽  
Vol 87 (4) ◽  
pp. 1379-1418 ◽  
Author(s):  
Andreas Reiserer ◽  
Gerhard Rempe
Keyword(s):  
Quantum Networks ◽  
Single Atoms ◽  
Optical Photons

scholarly journals Transmission through quantum networks

2000 ◽  
Vol 62 (24) ◽  
pp. R16294-R16297 ◽  
Author(s):  
Julien Vidal ◽  
Gilles Montambaux ◽  
Benoît Douçot
Keyword(s):  
Quantum Networks

scholarly journals Direct quantification of topological protection in symmetry-protected photonic edge states at telecom wavelengths

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Sonakshi Arora ◽  
Thomas Bauer ◽  
René Barczyk ◽  
Ewold Verhagen ◽  
L. Kuipers
Keyword(s):  
Near Field ◽  
Edge States ◽  
Quantum Networks ◽  
Hall Effects ◽  
Upper Limits ◽  
On Chip ◽  
Symmetry Protected ◽  
Topological Robustness ◽  
Direct Quantification ◽  
Sub Wavelength

AbstractTopological on-chip photonics based on tailored photonic crystals (PhCs) that emulate quantum valley-Hall effects has recently gained widespread interest owing to its promise of robust unidirectional transport of classical and quantum information. We present a direct quantitative evaluation of topological photonic edge eigenstates and their transport properties in the telecom wavelength range using phase-resolved near-field optical microscopy. Experimentally visualizing the detailed sub-wavelength structure of these modes propagating along the interface between two topologically non-trivial mirror-symmetric lattices allows us to map their dispersion relation and differentiate between the contributions of several higher-order Bloch harmonics. Selective probing of forward- and backward-propagating modes as defined by their phase velocities enables direct quantification of topological robustness. Studying near-field propagation in controlled defects allows us to extract upper limits of topological protection in on-chip photonic systems in comparison with conventional PhC waveguides. We find that protected edge states are two orders of magnitude more robust than modes of conventional PhC waveguides. This direct experimental quantification of topological robustness comprises a crucial step toward the application of topologically protected guiding in integrated photonics, allowing for unprecedented error-free photonic quantum networks.

Security Assessment of Quantum Networks

2021 ◽  
Author(s):  
Yizhi Huang ◽  
Xingjian Zhang ◽  
Hongyi Zhou ◽  
Xiongfeng Ma
Keyword(s):  
Security Assessment ◽  
Quantum Networks
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