Quantum detection theory is a reformulation in quantum mechanical terms of statistical decision theory as applied to the detection of signals in random noise density operators take the place of the probability density functions of conventional statistics. Quantum detection and estimation theory edited by carl w helstrom volume 123 pages iii ix 1 309 1976 download full volume previous volume next volume actions for selected chapters select all deselect all download pdfs export citations show all chapter previews show all chapter previews. Quantum detection and estimation theory a review quantum detection theory is a reformulation in quantum mechanical terms of statistical decision theory as applied to the detection of signals in random noise. free book quantum detection and estimation theory uploaded by hermann hesse quantum detection theory is a reformulation in quantum mechanical terms of statistical decision theory as applied to the detection of signals in random noise density operators take the place of the probability density functions of conventional. The estimation of any of those parameters is in a certain sense a measurement to be performed on the system now a measurement is ordinarily associated in quantum theory with a self adjoint operator on the hilbert space and the outcome of the measurement is required to be a number in the spectrum of that operator