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Updated: Dec 27, 2025

Orienteering as a Tool for Cognitive Research: An Implementation Guide
Published on: November 29, 2024
Experimental Optimal Orienteering via Parallel and Antiparallel Spins
Jun-Feng Tang1,2, Zhibo Hou1,2, Jiangwei Shang3
1Key Laboratory of Quantum Information, University of Science and Technology of China, CAS, Hefei 230026, China.
Abstract:
Antiparallel spins are superior in orienteering to parallel spins. This intriguing phenomenon is tied to entanglement associated with quantum measurements rather than quantum states. Using photonic systems, we experimentally realize the optimal orienteering protocols based on parallel spins and antiparallel spins, respectively. The optimal entangling measurements for decoding the direction information from parallel spins and antiparallel spins are realized using photonic quantum walks, which is a useful idea that is of wide interest in quantum information processing and foundational studies. Our experiments clearly demonstrate the advantage of antiparallel spins over parallel spins in orienteering. In addition, entangling measurements can extract more information than local measurements even if no entanglement is present in the quantum states.
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