Coupled integrated photonic quantum memristors using a single photon source made of a colour center
- URL: http://arxiv.org/abs/2602.14736v1
- Date: Mon, 16 Feb 2026 13:25:53 GMT
- Title: Coupled integrated photonic quantum memristors using a single photon source made of a colour center
- Authors: Alessio Baldazzi, Roy Philip George Konnoth Ancel, Sebastiano Guaraldo, Xuan Chen, Ziad Abi Akar, Regis Deturche, Stefano Azzini, Christophe Couteau, Lorenzo Pavesi,
- Abstract summary: Photonic quantum memristors provide a measurement-induced route to nonlinear and history-dependent quantum dynamics.<n>Here, we experimentally realize and characterize a network of two coupled photonic quantum memristors with crossed feedback.<n>Our results establish coupled integrated photonic quantum memristors as scalable nonlinear building blocks.
- Score: 2.552533024727942
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Photonic quantum memristors provide a measurement-induced route to nonlinear and history-dependent quantum dynamics. Experimental demonstrations have so far focused on isolated devices or simple cascaded devices configurations. Here, we experimentally realize and characterize a network of two coupled photonic quantum memristors with crossed feedback, implemented on a silicon nitride photonic integrated circuit and fed by a room-temperature single-photon source based on a silicon-vacancy color center SiV$^-$ in a nanodiamond. Each memristor consists of an integrated Mach-Zehnder interferometer whose transfer function is adaptively updated by photon detection events on another memristor, thus generating novel non-Markovian input-output dynamics with an enhanced memristive behaviour compared to single devices. In particular, we report inter-memristor input-output hysteresis curves exhibiting larger form factors and displaying self-intersecting loops, respectively revealing marked bistability and topologically non-trivial memory dynamics. Furthermore, numerical simulations show how these features emerge from the interplay between memory depth and relative input phase, for both intra- and inter-memristor input-output relations. Our results establish coupled integrated photonic quantum memristors as scalable nonlinear building blocks and highlight their potential for implementing compact quantum neuromorphic and reservoir computing architectures.
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