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quant-ph2008★ 33 cited
XX model on the circle
A. De Pasquale, G. Costantini, P. Facchi +3
We diagonalize the XX model with a finite number of spins and periodic boundary conditions. We solve for the ground state, focus on the rapidity of the convergence to the thermodyn…
quant-ph1997★ 6 cited
A Generalization of Deutsch's Example
Giovanni Costantini, Fabrizio Smeraldi
Quantum parallelism is the main feature of quantum computation. In 1985 D. Deutsch showed that a single quantum computation may be sufficient to state whether a two-valued function…