Quantum metrology is one of the most promising applications of quantum technologies. The
aim of this research field is the estimation of unknown parameters exploiting quantum …

Quantum photonic system has made remarkable achievements in computing and
communication. Serving as quantum information carriers, photons are flying qubits and …

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 …

Quantum superposition is the cornerstone of quantum mechanics, where interference
fringes originate in the self-interference of a single photon via indistinguishable photon …

Bohr's complementarity is one central tenet of quantum physics. The paradoxical wave-
particle duality of quantum matters and photons has been tested in Young's double-slit …

The initialization of a quantum system into a certain state is a crucial aspect of quantum
information science. While a variety of measurement strategies have been developed to …

One of the most remarkable features of quantum physics is that attributes of quantum
objects, such as the wavelike and particlelike behaviors of single photons, can be …

We report an experiment with neutrons in a silicon perfect crystal interferometer, that realizes
a quantum Cheshire Cat in a delayed choice setting. In our setup the quantum Cheshire Cat …

Simultaneous observation of the wave and particle natures of a quantum object under one
experimental arrangement represents the latest development regarding wave-particle …

The delayed-choice thought experiment proposed by Wheeler has been demonstrated over
the last several decades for the wave-particle duality of a single photon. The delayed-choice …