Work

Perfect chiral quantum routing

Year: 2025

Type: article

Abstract: Routing classical and quantum information is a fundamental task for quantum information technologies and processes. Here, we consider information encoded in the position of a quantum walker on a graph, and we design an optimal structure to achieve perfect quantum routing, exploiting chirality and weighting of the edges. The topology, termed the lily graph, enables perfect (i.e., with fidelity one) and robust routing of classical (localized) or quantum (superposition) states of the walker to $n$ different, orthogonal, spatial regions of the graph, corresponding to the $n$ possible outputs of the device. The routing time is independent of the input signal and the number of outputs, making our scheme a robust and scalable solution for all quantum networks.

Source: Physical Review A

DOI: 10.1103/physreva.111.032439

Authors: Simone Cavazzoni, Giovanni Ragazzi, Paolo Bordone, Matteo G. A. Paris

Institutions: University of Modena and Reggio Emilia, Istituto Nanoscienze, University of Milan, Istituto Nazionale di Fisica Nucleare, Sezione di Milano

Language: English

Topic: Quantum Computing Algorithms and Architecture

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: green

Funders: Istituto Nazionale di Alta Matematica "Francesco Severi", European Commission, Ministero dell'Università e della Ricerca, Gruppo Nazionale per la Fisica Matematica

Awards: G3193045930, Profiling the toxicity of new drugs: a non animal-based approach integrating toxicodynamics and biokinetics