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25 papers · 1 filter
Quantum State Disturbance vs. Information Gain: Uncertainty Relations for Quantum Information
Christopher A. Fuchs, Asher Peres
When an observer wants to identify a quantum state, which is known to be one of a given set of non-orthogonal states, the act of observation causes a disturbance to that state. We…
Chaos in the Quantum Measurement Record
M. A. Nielsen
We investigate measures of chaos in the measurement record of a quantum system which is being observed. Such measures are attractive because they can be directly connected to exper…
Estabrook-Wahlquist Prolongations and Infinite-Dimensional Algebras
J. D. Finley, III
Detailed mappings between zero-curvture equations for prolongation structures of nonlinear pde's and Estabrook-Wahlquist algorithms for same are given. The differences are exemplif…
Noncommuting mixed states cannot be broadcast
H. Barnum, C. M. Caves, C. A. Fuchs +2
We show that, given a general mixed state for a quantum system, there are no physical means for {\it broadcasting\/} that state onto two separate quantum systems, even when the sta…
Neutral hydrogen in the nearby galaxies Dwingeloo 1 and Dwingeloo 2
W. B. Burton, M. A. W. Verheijen, R. C. Kraan-Korteweg +1
We present observations made with the Westerbork Synthesis Radio Telescope of HI emission from Dwingeloo 1, a nearby barred spiral discovered during the Dwingeloo Obscured Galaxies…
Measurement of and in collisions at TeV
F. Abe
We present a measurement of and in proton - antiproton collisions at TeV using a significantly improved understandi…