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Simulating a CP-violating topological term in gauge theories
Haralambos Panagopoulos, Ettore Vicari
We present recent results on the theta-dependence of four-dimensional SU(N) gauge theories, where theta is the coefficient of the CP-violating topological term in the Lagrangian. I…
Exact relations between particle fluctuations and entanglement in Fermi gases
Pasquale Calabrese, Mihail Mintchev, Ettore Vicari
We derive exact relations between the Renyi entanglement entropies and the particle number fluctuations of spatial connected regions in systems of N noninteracting fermions in arbi…
Entanglement entropies in free fermion gases for arbitrary dimension
Pasquale Calabrese, Mihail Mintchev, Ettore Vicari
We study the entanglement entropy of connected bipartitions in free fermion gases of N particles in arbitrary dimension d. We show that the von Neumann and Renyi entanglement entro…
Entanglement Entropy of Quantum Wire Junctions
Pasquale Calabrese, Mihail Mintchev, Ettore Vicari
We consider a fermion gas on a star graph modeling a quantum wire junction and derive the entanglement entropy of one edge with respect to the rest of the junction. The gas is free…
The 4D SU(3) gauge theory with an imaginary theta term
Haralambos Panagopoulos, Ettore Vicari
We study the scaling behavior of the 4D SU(3) lattice gauge theory in the presence of a theta term, by Monte Carlo simulations computing the topological properties at imaginary the…
Interplay between temperature and trap effects in one-dimensional lattice systems of bosonic particles
Giacomo Ceccarelli, Christian Torrero, Ettore Vicari
We investigate the interplay of temperature and trap effects in cold particle systems at their quantum critical regime, such as cold bosonic atoms in optical lattices at the transi…
Anisotropic perturbations in three-dimensional O(N)-symmetric vector models
Martin Hasenbusch, Ettore Vicari
We investigate the effects of anisotropic perturbations in three-dimensional O(N)-symmetric vector models. In order to assess their relevance for the critical behavior, we determin…
Ferromagnetic-glassy transitions in three-dimensional Ising spin glasses
Giacomo Ceccarelli, Andrea Pelissetto, Ettore Vicari
We investigate the ferromagnetic-glassy transitions which separate the low-temperature ferromagnetic and spin-glass phases in the temperature-disorder phase diagram of three-dimens…
Critical dynamics in trapped particle systems
Gianluca Costagliola, Ettore Vicari
We discuss the effects of a trapping space-dependent potential on the critical dynamics of lattice gas models. Scaling arguments provide a dynamic trap-size scaling framework to de…
The entanglement entropy of 1D systems in continuous and homogenous space
Pasquale Calabrese, Mihail Mintchev, Ettore Vicari
We introduce a systematic framework to calculate the bipartite entanglement entropy of a compact spatial subsystem in a one-dimensional quantum gas which can be mapped into a nonin…
The entanglement entropy of one-dimensional gases
Pasquale Calabrese, Mihail Mintchev, Ettore Vicari
We introduce a systematic framework to calculate the bipartite entanglement entropy of a spatial subsystem in a one-dimensional quantum gas which can be mapped into a noninteractin…
Finite-size scaling in two-dimensional Ising spin glass models
Francesco Parisen Toldin, Andrea Pelissetto, Ettore Vicari
We study the finite-size behavior of two-dimensional spin-glass models. We consider the +-J model for two different values of the probability of the antiferromagnetic bonds and the…