Ruggero Vaia Profile Page
Ruggero Vaia


- Quantum information transfer through quantum channels and optimal ballistic transfer mechanism
- Magnetic impurities in 2D antiferromagnets and effect of BKT vortices on the induced alternating magnetization
- Interaction of quantum spin systems with the crystal lattice treated as environmental effect
- General path-integral theory of environmental coupling and reentrant enhancement of quantum fluctuations
- Classical limit of the Ising model and of its quantum phase transition
- Two-dimensional Heisenberg antiferromagnet with applied field: effective anisotropy and field-tunable Kosterlitz-Thouless transition
- Two-dimensional antiferromagnets with small anisotropy, both easy axis and easy-plane
- Quantum Monte Carlo algorithm for a dissipative system and low-temperature phase diagram of two-dimensional Josephson-junction arrays with resistive shunts
- Systems with anomalous quantum dissipation: bath-momentum coupling
- Dissipative quantum systems and application to two-dimensional Josephson-junction arrays: quantum phase diagram and its modifications for resistive dissipation
- Classical and quantum Thermodynamics of the two-dimensional antiferromagnet with easy-axis anisotropy, Ising transition
- Effective Hamiltonian for boson systems through holomorphic variables, calculation of the critical temperature of three-dimensional quantum Heisenberg magnets
- Classical and quantum Thermodynamics of the two-dimensional easy-plane Heisenberg antiferromagnet on the triangular lattice: chirality and coexistence of Ising and Kosterlitz-Thouless transitions
- Effective potential for dissipative quantum systems
- Thermodynamics of the two-dimensional isotropic Heisenberg antiferromagnet
- Trotter-number extrapolation in quantum Monte Carlo simulations
- Thermodynamics of two-dimensional quantum magnets with planar anisotropy:Kosterlitz-Thouless transition
- Thermodynamics of quantum spin chains with planar anisotropy and applied field: solitonic excitations
- Thermodynamics and dynamics of rare-gas solids using the effective potential
- Dynamical correlation functions of atomic chains. Frequency moments within PQSCHA
- General theory of the "pure-quantum self-consistent harmonic approximation" (PQSCHA). Effective classical Hamiltonian
- Study of the quantum thermodynamics of pair and chains of atoms with anharmonic interaction (Lennard-Jones, Toda, Morse) by means of the effective potential. Calculation of static correlation functions
- Variational method for quantum statistical mechanics. Classical effective potential and application to nonlinear one-dimensional models
- Statistical mechanics of one-dimensional Heisenberg ferromagnets: static and dynamical quantities
- General formulation of the theory of classical gravitation and gauge fields in the space of reference frames and calculation of the multipole expansion for a test particle

Selected publications here

Personal webpage


Contact Info

Ruggero Vaia
+39 055 522 6673

I am at room 129 of Building B of the CNR Research Area of Florence, actually located in Sesto Forentino (FI) .


03/06/14 10:21:49Newton cradle
05/05/14 10:28:27How to build a quantum Newton's cradle
28/02/13 08:24:27Ruggero Vaia - Selected papers