QUANTUM BINARY DECISION FOR DRIVEN HARMONIC-OSCILLATOR

We address the problem of determining whether or not a harmonic oscill ator has been perturbed by an external force. Quantum detection and es timation theory has been used in devising optimum measurement scheme a ccording to the Neyman-Pearson criterion. Detection probability has be en evaluated for different initial state preparations of oscillator. T he corresponding lower bounds on minimum detectable perturbation inten sity has been evaluated and a general bound for random phase perturbat ion has been also induced.