Resource-efficient entanglement detection in high-dimensional states via two-qubit witnesses
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.
Fields of Study & Subjects
Quantum Information and Cryptography
Quantum Computing Algorithms and Architecture
Integrated Circuits and Semiconductor Failure Analysis
Publication details
- Journal / source
- Physical Review Research
- Publisher
- American Physical Society (APS)
- Volume
- 8
- Issue
- 1
- Publication date
- 9 January 2026
- Language
- EN