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FC
Fernando Cusso Perez
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Publications
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Decoherence Correction by the Zeno Effect and Non-Holonomic Control
Celso Villas-Boas
et al.
Oct 31, 2002
We show that multidimensional Zeno effect combined with non-holonomic controlallows to efficiently protect quantum systems from decoherence by a methodsimilar to classical coding. Contrary to the conventional approach, our methodis applicable to arbitrary error-inducing Hamiltonians and general quantumsystems. We also propose algorithms of finding encoding that approaches theHamming upper bound along with methods of practical realizations of theencodings. Two new codes protecting 2 information qubits out of 7 and 4information qubits out of 9 against a single error with arbitrarily smallprobability of failure are constructed as an example.
Quantum Mechanics
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Quantum Mechanics
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Remarks on $(1-q)$ expansion and factorization approximation in the Tsallis nonextensive statistical mechanics
Piet Bracke
et al.
Nov 1, 2001
The validity of (1-q) expansion and factorization approximations are analysedin the framework of Tsallis statistics. We employ exact expressions forclassical independent systems (harmonic oscillators) by considering theunnormalized and normalized constrainsts. We show that these approxiamtions cannot be accurate in the analysis of systems with many degrees of freedom.
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Numerical Implementation of Three-Body Forces in Bound State Faddeev Calculations in Three Dimensions
Steven Jones
et al.
Apr 9, 2002
The Faddeev equations for the three-body bound state are solved directly asthre e-dimensional integral equations without employing partial wavedecomposition. Two-body forces of the Malfliet-Tjon type and simple spinindependent genuine three-body forces are considered for the calculation of thethree-body binding energy.
Nuclear Physics
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Nuclear Physics
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