We study the ground state of a system of spinless electrons interacting through a screened
Coulomb potential in a lattice ring. By using analytical arguments, we show that, when the …

We demonstrate that a large class of first-order quantum phase transitions, namely,
transitions in which the ground state energy per particle is continuous but its first order …

By using a recently proposed probabilistic approach, we determine the exact ground state of
a class of matrix Hamiltonian models characterized by the fact that in the thermodynamic …

We disprove the Vafa-Witten theorem on the impossibility of spontaneously breaking parity
in vectorlike gauge field theories, identifying a mechanism driven by quantum fluctuations …

By using a previously established exact characterization of the ground state of random
potential systems in the thermodynamic limit, we determine the ground and first excited …

We propose an exact renormalization group equation for lattice gauge theories, which has
no dependence on the lattice spacing. We instead relate the lattice spacing properties …

We present a parallel implementation of the Bose Hubbard model, using imaginary time
propagation to find the lowest quantum eigenstate and real time propagation for simulation …

We present a large deviation analysis of a recently proposed probabilistic approach to the
study of the ground-state properties of lattice quantum systems. The ground-state energy as …

We prove that lattice quantum systems may undergo a first-order quantum phase transition
through a general mechanism which consists in an infinite dilution of the states associated to …

Studying the unitary time evolution of strongly correlated quantum systems is one of the most
challenging theoretical and experimental problems in physics. For an important class of one …