Experimental test of the relation between coherence and path information
Gao, J. Jiao, Z.-Q. Hu, C.-Q. Qiao, L.-F. Ren, R.-J. Tang, H. Ma, Z.-H. Fei, S.-M. Vedral, V. Jin, X.-M.
Gao, J.
Jiao, Z.-Q.
Hu, C.-Q.
Qiao, L.-F.
Ren, R.-J.
Tang, H.
Ma, Z.-H.
Fei, S.-M.
Jin, X.-M.
Citations
Altmetric:
Alternative Title
Abstract
Quantum coherence stemming from the superposition behaviour of a particle beyond the classical realm, serves as one of the most fundamental features in quantum mechanics. The wave-particle duality phenomenon, which shares the same origin, has a strong relationship with quantum coherence. Recently, an elegant relation between quantum coherence and path information has been theoretically derived. Here, we experimentally test such new duality by l1-norm measure and the minimum-error state discrimination. We prepare three classes of two-photon states encoded in polarisation degree of freedom, with one photon serving as the target and the other photon as the detector. We observe that wave-particle-like complementarity and Bagan’s equality, defined by the duality relation between coherence and path information, is well satisfied. Our results may shed new light on the original nature of wave-particle duality and on the applications of quantum coherence as a fundamental resource in quantum technologies. © 2018, The Author(s).
Keywords
Source Title
Communications Physics
Publisher
Nature Research
Series/Report No.
Collections
Rights
Attribution 4.0 International
Date
2018
DOI
10.1038/s42005-018-0090-8
Type
Article