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22 papers · 1 filter
Instruments and mutual entropies in quantum information
Alberto Barchielli, Giancarlo Lupieri
General quantum measurements are represented by instruments. In this paper the mathematical formalization is given of the idea that an instrument is a channel which accepts a quant…
Computational Methods for the Construction of a Class of Noetherian Operators
A. Damiano, I. Sabadini, D. C. Struppa
This paper presents some algorithmic techniques to compute explicitly the noetherian operators associated to a class of ideals and modules over a polynomial ring. The procedures we…
Telephone-cord instabilities in thin smectic capillaries
Paolo Biscari, Maria Carme Calderer
Telephone-cord patterns have been recently observed in smectic liquid crystal capillaries. In this paper we analyse the effects that may induce them. As long as the capillary keeps…
Hitting properties of parabolic s.p.d.e.'s with reflection
Robert C. Dalang, C. Mueller, L. Zambotti
We study the hitting properties of the solutions of a class of parabolic stochastic partial differential equations with singular drifts that prevent from becoming negative.…
Instruments and channels in quantum information theory
Alberto Barchielli, Giancarlo Lupieri
While a positive operator valued measure gives the probabilities in a quantum measurement, an instrument gives both the probabilities and the a posteriori states. By interpreting t…
On the astronomical content of the sacred landscape of Cusco in Inka times
Giulio Magli
The sacred landscape of the Inka capital Cusco was conceived in accordance with a complex cosmographic view in which religion and astronomy were intimately connected. Some previous…