Work

Deterministic feedforward-based generation of large optical coherent-state superposition

Year: 2026

Type: article

Abstract: Large optical coherent-state superpositions are essential to advance quantum sensing, quantum repeaters, and error-correction codes. We propose a deterministic feedforward protocol employing qubit-mode dispersive coupling, currently available in cavity quantum electrodynamics (QED). We show this single-mode protocol to outperform the advanced three-mode Gaussian-photon-number-resolving detector scheme in terms of both average fidelity and quantum non-Gaussian phase-space properties, and propose sensitivity to weak displacements of interference fringes as a feasible and conclusive witness of quantum interference. This approach combining QED with electro-optical feedforward is extendable to tailored states for applications and other platforms.

Source: Physical Review Research

DOI: 10.1103/l944-5x1g

Authors: Michele N. Notarnicola, Marcin Jarzyna, Radim Filip

Institutions: Palacký University Olomouc, University of Warsaw

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,625

Funders: European Commission, Ministerstvo Školství, Mládeže a Tělovýchovy, Grantová Agentura České Republiky, QuantERA