58 citations · 377 across the 66 of their papers we have counts for
66 papers
Measurement Models with Separable Interaction Channels
Stan Gudder
Measurement models (MMs) stand at the highest structural level of quantum measurement theory. MMs can be employed to construct instruments which stand at the next level. An instrum…
Properties of Sequential Products
Stanley Gudder
Our basic concept is the set of effects on a finite dimensional complex Hilbert space . If , we define the sequential product $a[\mathcal{…
Multi-Observables and Multi-Instruments
Stan Gudder
This article introduces the concepts of multi-observables and multi-instruments in quantum mechanics. A multi-observable (multi-instrument ) has an outcome space o…
Dual Quantum Instruments and Sub-observables
Stanley Gudder
We introduce the concepts of dual instruments and sub-observables. We show that although a dual instruments measures a unique observable, it determines many sub-observables. We def…
Real-Valued Observables and Quantum Uncertainty
Stanley Gudder
We first present a generalization of the Robertson-Heisenberg uncertainty principle. This generalization applies to mixed states and contains a covariance term. For faithful states…
Entropy of Quantum Measurements
Stan Gudder
If is a quantum effect and is a state, we define the -entropy which gives the amount of uncertainty that a measurement of provides about . The smaller $S…