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Open AccessArticle

Quantum Memristors in Frequency-Entangled Optical Fields

1
Department of Physical Chemistry, University of the Basque Country UPV/EHU, Apartado 644, 48080 Bilbao, Spain
2
Quantum Information Science Group, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
3
Institute of Physics, Federal University of Goiás, 74.690-900 Goiânia, Goiás, Brazil
*
Authors to whom correspondence should be addressed.
Materials 2020, 13(4), 864; https://doi.org/10.3390/ma13040864
Received: 24 December 2019 / Revised: 17 January 2020 / Accepted: 5 February 2020 / Published: 14 February 2020
(This article belongs to the Special Issue Nanostructure-Based Memory Devices)
A quantum memristor is a passive resistive circuit element with memory, engineered in a given quantum platform. It can be represented by a quantum system coupled to a dissipative environment, in which a system–bath coupling is mediated through a weak measurement scheme and classical feedback on the system. In quantum photonics, such a device can be designed from a beam splitter with tunable reflectivity, which is modified depending on the results of measurements in one of the outgoing beams. Here, we show that a similar implementation can be achieved with frequency-entangled optical fields and a frequency mixer that, working similarly to a beam splitter, produces state superpositions. We show that the characteristic hysteretic behavior of memristors can be reproduced when analyzing the response of the system with respect to the control, for different experimentally attainable states. Since memory effects in memristors can be exploited for classical and neuromorphic computation, the results presented in this work could be a building block for constructing quantum neural networks in quantum photonics, when scaling up. View Full-Text
Keywords: quantum memristors; memristive systems; quantum photonics; quantum neural networks quantum memristors; memristive systems; quantum photonics; quantum neural networks
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MDPI and ACS Style

Gonzalez-Raya, T.; Lukens, J.M.; Céleri, L.C.; Sanz, M. Quantum Memristors in Frequency-Entangled Optical Fields. Materials 2020, 13, 864.

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