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

• URL: http://arxiv.org/abs/2603.22068v1
• Date: Mon, 23 Mar 2026 15:02:37 GMT
• Title: Deterministic feedforward-based generation of large optical coherent-state superposition
• Abstract summary: We propose a deterministic feedforward protocol employing qubit-mode dispersive coupling.<n>We show this protocol to outperform the advanced three-mode Gaussian-photon-number-resolving detector scheme.
• Score: 1.1215180462528547
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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 both in terms of 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.

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