The wave-particle duality dates back to Einstein's explanation of the photoelectric effect
through quanta of light and de Broglie's hypothesis of matter waves. Quantum mechanics …

Integrated optical components on lithium niobate play a major role in standard high-speed
communication systems. Over the last two decades, after the birth and positioning of …

We derive a generalized wave-particle duality relation for arbitrary multipath quantum
interference phenomena. Beyond the conventional notion of the wave nature of a quantum …

Quantum systems exhibit particle-or wavelike behavior depending on the experimental
apparatus they are confronted by. This wave-particle duality is at the heart of quantum …

We present surprising experimental evidence regarding the past of photons passing through
an interferometer. The information about the positions through which the photons pass in the …

The goal of quantum metrology is to improve measurements' sensitivities by harnessing
quantum resources. Metrologists often aim to maximize the quantum Fisher information …

The counterintuitive features of quantum physics challenge many common-sense
assumptions. In an interferometric quantum eraser experiment, one can actively choose …

Bohr's complementarity principle has been challenged by quantum delayed-choice
experiments wherein quantum systems are claimed to behave neither as wave nor as a …

We provide the first experimental confirmation of a three-way quantum coherence identity
possessed by single pure-state photons. Our experimental results demonstrate that …

Wave-particle duality is the most fundamental description of the nature of a quantum object,
which behaves like a classical particle or wave depending on the measurement apparatus …