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- Istituto Nazionale di Fisica Nucleare, Sezione di FirenzeIT68 papers
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13 papers · 1 filter
Entanglement and factorized ground states in two-dimensional quantum antiferromagnets
Tommaso Roscilde, Paola Verrucchi, Andrea Fubini +2
Making use of exact results and quantum Monte Carlo data for the entanglement of formation, we show that the ground state of anisotropic two-dimensional S=1/2 antiferromagnets in a…
Dissipation-driven phase transition in 2D Josephson arrays
Luca Capriotti, Alessandro Cuccoli, Andrea Fubini +2
We analyze the interplay of dissipative and quantum effects in the proximity of a quantum phase transition. The prototypical system is a resistively shunted two-dimensional Josephs…
A microscopic model of evolution of recombination
Franco Bagnoli, Carlo Guardiani
We study the evolution of recombination using a microscopic model developed within the frame of the theory of quantitative traits. Two components of fitness are considered: a stati…
Tailoring Phase Space : A Way to Control Hamiltonian Transport
Guido Ciraolo, Cristel Chandre, Ricardo Lima +3
We present a method to control transport in Hamiltonian systems. We provide an algorithm - based on a perturbation of the original Hamiltonian localized in phase space - to design…
Phase transitions of extended-range probabilistic cellular automata with two absorbing states
F. Bagnoli, F. Franci, R. Rechtman
We study phase transitions in a long-range one-dimensional cellular automaton with two symmetric absorbing states. It includes and extends several other models, like the Ising and…
Resolutions of Segre embeddings of projective spaces of any dimension
Elena Rubei
This paper deals with syzygies of Segre embeddings. Let d >=3 and n_1, ..., n_d nonzero natural numbers. We prove that O(1,...., 1) on the product of P^{n_1}, ...,P^{n_d} satisfies…