Single-shot detection limits of quantum illumination with multi-qudit states
Abstract
We study multi-qudit states for single-shot detection limits of quantum illumination under white noise environment. We show that the optimal state is not a maximally entangled multipartite state but a combination of a maximally entangled bipartite state, since entanglement between signal states degrades the performance. The behaviors are obtained in the cases of three-qubit, three-qutrit, four-qubit, and four-ququart states, where the multi-qudit states can outperform the two-qubit entangled states. Moreover, we find that quantum correlation of the multi-qudit states can explain the quantum advantage over the two-qubit entangled states, but it is not valid for four-ququart states.
Fields of Study & Subjects
Quantum Information and Cryptography
Quantum Mechanics and Applications
Laser-Matter Interactions and Applications
Publication details
- Journal / source
- Scientific Reports
- Publisher
- Springer Science and Business Media LLC
- Volume
- 16
- Issue
- 1
- Publication date
- 13 June 2026
- Language
- EN