Quantum Memristors in Quantum Photonics

TL;DR

This paper introduces a method to realize quantum memristors using tunable beam splitters in quantum photonic systems, enabling controllable quantum memory with potential for integrated photonics applications.

Contribution

It presents a novel design for quantum memristors based on tunable beam splitters with feedback control, demonstrating their feasibility in integrated quantum photonics.

Findings

Design of a tunable, real-time controllable beam splitter for quantum photonics

Implementation of quantum memristor behavior with weak measurements and feedback

Feasibility analysis for integrated quantum photonic platforms

Abstract

We propose a method to build quantum memristors in quantum photonic platforms. We firstly design an effective beam splitter, which is tunable in real-time, by means of a Mach-Zehnder-type array with two equal 50:50 beam splitters and a tunable retarder, which allows us to control its reflectivity. Then, we show that this tunable beam splitter, when equipped with weak measurements and classical feedback, behaves as a quantum memristor. Indeed, in order to prove its quantumness, we show how to codify quantum information in the coherent beams. Moreover, we estimate the memory capability of the quantum memristor. Finally, we show the feasibility of the proposed setup in integrated quantum photonics.