129 citations · 531 across the 11 of their papers we have counts for
5 papers · 1 filter
Reading entanglement in terms of spin configurations in quantum magnets
Andrea Fubini, Tommaso Roscilde, Valerio Tognetti +2
We consider a quantum many-body system made of interacting spins on a lattice, and develop a formalism which allows to extract, out of conventional magnetic observabl…
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…
Path integral Monte Carlo for dissipative many-body systems
Luca Capriotti, Alessandro Cuccoli, Andrea Fubini +2
We address the possibility of performing numerical Monte Carlo simulations for the thermodynamics of quantum dissipative systems. Dissipation is considered within the Caldeira-Legg…
Effective Hamiltonian with holomorphic variables
A. Cuccoli, V. Tognetti, R. Giachetti +2
The pure-quantum self-consistent harmonic approximation (PQSCHA) permits to study a quantum system by means of an effective classical Hamiltonian. In this work the PQSCHA is reform…
Effective Hamiltonian, Mori Product and Quantum Dynamics
A. Cuccoli, V. Tognetti, R. Giachetti +1
An appropriate extension of the effective potential theory is presented that permits the approximate calculation of the dynamical correlation functions for quantum systems. These a…