Quantum variance: A measure of quantum coherence and quantum correlations for many-body systems
Quantum variance: A measure of quantum coherence and quantum correlations for many-body systems
Quantum coherence is a fundamental common trait of quantum phenomena, from the interference of matter waves to quantum degeneracy of identical particles. Despite its importance, estimating and measuring quantum coherence in generic, mixed many-body quantum states remains a formidable challenge, with fundamental implications in areas as broad as quantum condensed …