Work

Resource-efficient entanglement detection in high-dimensional states via two-qubit witnesses

Year: 2026

Type: article

Abstract: This paper presents an efficient method for detecting entanglement in high-dimensional two-qudit states by mapping the Hilbert space onto the space of two qubits. This transformation enables the use of well-established two-qubit entanglement witnesses. The proposed approach is not restricted to any specific class of states, successfully identifies a vast majority of pure entangled states, and requires a number of measurements that does not increase with the dimensionality of the qudits. The method demonstrates solid sensitivity when applied to two notable classes of states—incomplete-permutation-symmetric states and random pure states mixed with white noise—and is shown to be feasible with current experimental techniques.

Source: Physical Review Research

DOI: 10.1103/7swz-fdw9

Authors: Josef Kadlec, Artur Barasiński, Karel Lemr

Institutions: Palacký University Olomouc, University of Wrocław

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

Funder: Grantová Agentura České Republiky