Wave-particle duality revisited: Neither wave nor particle
arXiv:1907.09836
Abstract
A textbook interpretation of quantum physics is that quantum objects can be described in a particle or a wave picture, depending on the operations and measurements performed. Beyond this widely held believe, we demonstrate in this contribution that neither the wave nor the particle description is sufficient to predict the outcomes of quantum-optical experiments. To show this, we derive correlation-based criteria that have to be satisfied when either particles or waves are fed into our interferometer. Using squeezed light, it is then confirmed that measured correlations are incompatible with either picture. Thus, within one single experiment, it is proven that neither a wave nor a particle model explains the observed phenomena. Moreover, we formulate a relation of wave and particle representations to two incompatible notions of quantum coherence, a recently discovered resource for quantum information processing.For such an information-theoretic interpretation of our method, we certify the nonclassicality of coherent states - the quantum counterpart to classical waves - in the particle picture, complementing the known fact that photon states are nonclassical in the typically applied wave picture.
References in corpus (16)
- Review article: Linear optical quantum computing
- Quantum Coherence as a Resource
- Continuous variable quantum cryptography using coherent states
- Quantum Resource Theories
- Relations between coherence and path information
- Converting Nonclassicality into Entanglement
- Unified quantification of nonclassicality and entanglement
- Non-classicality criteria from phase-space representations and information-theoretical constraints are maximally inequivalent
- Entanglement of photons in their dual wave-particle nature
- Quasiprobabilities for Multipartite Quantum Correlations of Light
- Uncovering Quantum Correlations with Time-Multiplexed Click Detection
- Correlation measurements with on-off detectors
- Probing Measurement Induced Effects in Quantum Walks via Recurrence
- Detector-Independent Verification of Quantum Light
- Geometrical picture of photocounting measurements
- Wave-particle Duality in Complex Quantum Systems