2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/93652Measurement and fluctuations are closely related to each other in quantum mechanics. This fact is explicitly demonstrated in the case of a quantum non-demolition photodetector which is composed of a double quantum-wire electron interferometer.14 pages, 2 figuresQuantum PhysicsMesoscale and Nanoscale PhysicsOpticstext