Teleportation of non-Gaussian states via nonlinear feedforward

Year: 2026

Type: article

Abstract: Measurement-induced quantum computation with continuous-variable cluster states utilizes teleportation to transmit and alter quantum states via measurement-and-feedforward control. One of the key challenges of this approach is the deterioration of quantum states caused by the noise added due to imperfect entanglement of the cluster. We analyze the propagation of a quantum non-Gaussian state with nonlinear squeezing through a small cluster state. We show that a nonlinear feedforward in the deterministic teleportation protocol reduces the added noise and improves the nonlinear squeezing transferred. In a probabilistic regime, the improvement can be manifested even with current experimental resources. Better processing of non-Gaussian states can bring us closer to the necessary interplay between cluster states and non-Gaussianity required by quantum computing.

Source: Physical Review Applied

DOI: 10.1103/4k4w-dc3l

Authors: Vojtěch Kala, Mattia Walschaers, Radim Filip, Petr Marek

Institutions: Palacký University Olomouc, Centre National de la Recherche Scientifique, Collège de France, Université Paris Sciences et Lettres, Laboratoire Kastler Brossel, École Normale Supérieure - PSL, Sorbonne Université

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: hybrid

Funders: European Commission, Agence Nationale de la Recherche, Ministerstvo Školství, Mládeže a Tělovýchovy, Grantová Agentura České Republiky, QuantERA, HORIZON EUROPE Framework Programme

OpenAlex ID: W4394710598