163 citations · 1k across the 36 of their papers we have counts for
5 papers · 1 filter
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 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 - depending on quantum coupling an…
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…
Spectral shapes of solid neon
Gaia Pedrolli, Alessandro Cuccoli, Alessandro Macchi +2
We present a Path Integral Monte Carlo calculation of the first three moments of the displacement-displacement correlation functions of solid neon at different temperatures for lon…
Heisenberg antiferromagnet on the square lattice for S>=1
Alessandro Cuccoli, Valerio Tognetti, Paola Verrucchi +1
Theoretical predictions of a semiclassical method - the pure-quantum self-consistent harmonic approximation - for the correlation length and staggered susceptibility of the Heisenb…