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Large reconfigurable quantum circuits with SPAD arrays and multimode fibers

Year: 2023
Type: article
Abstract: Reprogrammable integrated optics provides a natural platform for tunable quantum photonic circuits, but faces challenges when high dimensions and high connectivity are involved. Here, we implement high-dimensional linear transformations on spatial modes of photons using wavefront shaping together with mode mixing in a multimode fiber, and measure photon correlations using a time-tagging single-photon avalanche diode (SPAD) array. Our demonstration of a generalization of a Hong-Ou-Mandel interference to 22 output ports shows the scalability potential of wavefront shaping in complex media in conjunction with SPAD arrays for implementing high-dimensional reconfigurable quantum circuits. Specifically, we achieved (80.5±6.8)% similarity for indistinguishable photon pairs and (84.9±7.0)% similarity for distinguishable photon pairs using 22 detectors and random circuits.
Source: Optica
DOI: 10.1364/optica.506943
Authors: Adrian Makowski, Michał Dąbrowski, Ivan Michel Antolovic, Claudio Bruschini, Hugo Defienne, Edoardo Charbon, Radek Lapkiewicz, Sylvain Gigan
Institutions: Collège de France, Laboratoire Kastler Brossel, University of Warsaw, International Centre for Translational Eye Research, École Polytechnique Fédérale de Lausanne, Institut des NanoSciences de Paris
Language: English
Open Access status: gold
Estimated APC paid: $3,208
Awards: G1557935660, G1957446924, G2640687431, G4489444712, G6169661887, G6438729384, G6604153567, G735078438, G8067344182, G8504956247
OpenAlex ID: W4390060464
FWCI: 1.151
Cites: 31
Cited by: 13
Related to: 10