Photonic quantum memory is the core element in quantum information processing (QIP). For
the scalable and convenient practical applications, great efforts have been devoted to the …

Macroscopic realism is the name for a class of modifications to quantum theory that allow
macroscopic objects to be described in a measurement-independent manner, while largely …

The Leggett-Garg inequality, an analogue of Bell's inequality involving correlations of
measurements on a system at different times, stands as one of the hallmark tests of quantum …

Quantum repeaters are critical components for distributing entanglement over long
distances in presence of unavoidable optical losses during transmission. Stimulated by the …

The generation and distribution of quantum correlations between photonic qubits is a key
resource in quantum information science. For applications in quantum networks and …

Tests of local realism and macrorealism have historically been discussed in very similar
terms: Leggett-Garg inequalities follow Bell inequalities as necessary conditions for classical …

Leggett and Garg formulated macrorealist models encoding our intuition on classical
systems, ie, physical quantities have a definite value that can be measured with minimal …

The Leggett-Garg inequality holds for any macrorealistic system that is being measured
noninvasively. A violation of the inequality can signal that a system does not conform to our …

Although quantum coherence is a basic trait of quantum mechanics, the presence of
coherences in the quantum description of a certain phenomenon does not rule out the …

Leggett–Garg inequality (LGI) is a time analogue of Bell's inequality that concerns
measurements performed on a system at different times. Violation to LGI indicates quantum …