Work

Universal Multiport Interferometers for Post‐Selected Multi‐Photon Gates

Year: 2024

Type: article

Abstract: It is showed how to use universal multiport interferometers' schemes in order to create photonic post‐selected Controlled‐Z and Controlled–Controlled‐Z gates, which are equivalent, modulo single‐qubit gates, to Controlled‐NOT and Toffoli gates, respectively. The new proposed method is based on the following ingredients: identical single photons, Mach–Zehnder interferometer networks, single‐photon detectors and post‐selection. In particular, by using dual‐rail path encoding together with auxiliary paths and single photons, the success probabilities of such gates is improved. This result further proves the complexity and richness of Reck and Clements schemes beyond the usual notions and practices of Boson Sampling.

Source: Advanced Quantum Technologies

DOI: 10.1002/qute.202400418

Authors: Alessio Baldazzi, Lorenzo Pavesi

Institution: University of Trento

Language: English

Topic: Quantum Computing Algorithms and Architecture

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,220

Funders: Provincia Autonoma di Trento, Horizon 2020 Framework Programme