scholarly journals Reproducible coherence characterization of superconducting quantum devices

2021 ◽  
Vol 119 (10) ◽  
pp. 100501
Author(s):  
Corey Rae H. McRae ◽  
Gregory M. Stiehl ◽  
Haozhi Wang ◽  
Sheng-Xiang Lin ◽  
Shane A. Caldwell ◽  
...  
Keyword(s):  
Quantum Devices

Fabrication and Characterization of Molybdenum Thin-Film Resistor for Superconducting Quantum Devices

2020 ◽  
Vol 30 (7) ◽  
pp. 1-4
Author(s):  
Tiantian Liang ◽  
Guofeng Zhang ◽  
Wentao Wu ◽  
Yongliang Wang ◽  
Lu Zhang ◽  
...  
Keyword(s):  
Thin Film ◽  
Quantum Devices ◽  
Film Resistor ◽  
Thin Film Resistor ◽  
Fabrication And Characterization

Modular Printed Circuit Boards for Broadband Characterization of Nanoelectronic Quantum Devices

2016 ◽  
Vol 65 (8) ◽  
pp. 1827-1835 ◽  
Author(s):  
Marco Lorenzo Valerio Tagliaferri ◽  
Alessandro Crippa ◽  
Simone Cocco ◽  
Marco De Michielis ◽  
Marco Fanciulli ◽  
...  
Keyword(s):  
Printed Circuit Boards ◽  
Circuit Boards ◽  
Quantum Devices ◽  
Printed Circuit

scholarly journals Experimental semi-autonomous eigensolver using reinforcement learning

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
C.-Y. Pan ◽  
M. Hao ◽  
N. Barraza ◽  
E. Solano ◽  
F. Albarrán-Arriagada
Keyword(s):  
Reinforcement Learning ◽  
Feedback Loop ◽  
Partial Information ◽  
Quantum Computer ◽  
Hermitian Operator ◽  
Single Shot ◽  
Quantum Devices ◽  
Quantum Technology ◽  
Future Technologies

AbstractThe characterization of observables, expressed via Hermitian operators, is a crucial task in quantum mechanics. For this reason, an eigensolver is a fundamental algorithm for any quantum technology. In this work, we implement a semi-autonomous algorithm to obtain an approximation of the eigenvectors of an arbitrary Hermitian operator using the IBM quantum computer. To this end, we only use single-shot measurements and pseudo-random changes handled by a feedback loop, reducing the number of measures in the system. Due to the classical feedback loop, this algorithm can be cast into the reinforcement learning paradigm. Using this algorithm, for a single-qubit observable, we obtain both eigenvectors with fidelities over 0.97 with around 200 single-shot measurements. For two-qubits observables, we get fidelities over 0.91 with around 1500 single-shot measurements for the four eigenvectors, which is a comparatively low resource demand, suitable for current devices. This work is useful to the development of quantum devices able to decide with partial information, which helps to implement future technologies in quantum artificial intelligence.

scholarly journals Cryogen-free scanning gate microscope for the characterization of Si/Si0.7Ge0.3 quantum devices at milli-Kelvin temperatures

AIP Advances ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 125122
Author(s):  
Seong Woo Oh ◽  
Artem O. Denisov ◽  
Pengcheng Chen ◽  
Jason R. Petta
Keyword(s):  
Quantum Devices ◽  
Scanning Gate

scholarly journals Physical characterization of quantum devices from nonlocal correlations

2015 ◽  
Vol 91 (2) ◽  
Author(s):  
Jean-Daniel Bancal ◽  
Miguel Navascués ◽  
Valerio Scarani ◽  
Tamás Vértesi ◽  
Tzyh Haur Yang
Keyword(s):  
Physical Characterization ◽  
Quantum Devices ◽  
Nonlocal Correlations

Fabrication and characterization of metal-semiconductor field-effect-transistor-type quantum devices

2004 ◽  
Vol 96 (1) ◽  
pp. 704-708 ◽  
Author(s):  
S. H. Son ◽  
K. H. Cho ◽  
S. W. Hwang ◽  
K. M. Kim ◽  
Y. J. Park ◽  
...  
Keyword(s):  
Field Effect ◽  
Field Effect Transistor ◽  
Quantum Devices ◽  
Effect Transistor ◽  
Fabrication And Characterization

scholarly journals Integrated Tool Set for Control, Calibration, and Characterization of Quantum Devices Applied to Superconducting Qubits

2021 ◽  
Vol 15 (3) ◽  
Author(s):  
Nicolas Wittler ◽  
Federico Roy ◽  
Kevin Pack ◽  
Max Werninghaus ◽  
Anurag Saha Roy ◽  
...  
Keyword(s):  
Superconducting Qubits ◽  
Quantum Devices ◽  
Tool Set

8 Characterization of Quantum Devices

2004 ◽  
pp. 297-332 ◽  
Author(s):  
Giacomo Mauro D’Ariano ◽  
Paoloplacido Lo Presti
Keyword(s):  
Quantum Devices

Full characterization of quantum correlated equilibria

2013 ◽  
Vol 13 (9&10) ◽  
pp. 846-860
Author(s):  
Zhaohui Wei ◽  
Shengyu Zhang
Keyword(s):  
Necessary Condition ◽  
Quantum Game ◽  
Quantum Devices ◽  
Full Characterization ◽  
Positive Gain ◽  
Conflicting Interests ◽  
Correlated Equilibria ◽  
Sufficient And Necessary Condition ◽  
Quantum Strategies

Quantum game theory aims to study interactions of people (or other agents) using quantum devices with possibly conflicting interests. Recently Zhang studied some quantitative questions in general quantum strategic games of growing sizes~\cite{Zha12}. However, a fundamental question not addressed there is the characterization of quantum correlated equilibria (QCE). In this paper, we answer this question by giving a sufficient and necessary condition for an arbitrary state $\rho$ being a QCE. In addition, when the condition fails to hold for some player $i$, we give an explicit positive-operator valued measurement (POVM) for that player to achieve a strictly positive gain of payoff. Finally, we give some upper bounds for the maximum gain by playing quantum strategies over classical ones, and the bounds are tight for some games.

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