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Effective quantum‐state and entanglement transfer can be obtained by inducing a coherent dynamics in quantum wires with homogeneous intrawire interactions. This goal is accomplished by… (More)

- Alessandro Cuccoli, Niccolò Del Sette, Ruggero Vaia
- Physical review. E, Statistical, nonlinear, and…
- 2010

The system-plus-reservoir (SPR) model is the most common and effective approach to study quantum dissipative effects. Indeed, it makes quantization possible by considering the whole energy-conserving… (More)

- Ruggero Vaia
- Front. Chem.
- 2013

This comment regards a recent paper by Babbush, Parkhill, and AspuruGuzik (henceforth BPA) (Babbush et al., 2013). The subject is the equilibrium thermodynamics of a system of many quantum particles… (More)

- Alessandro Cuccoli, A. Fubini, V. Tognetti, Ruggero Vaia
- Physical review. E, Statistical, nonlinear, and…
- 2001

The standard system-plus-reservoir approach used in the study of dissipative systems can be meaningfully generalized to a dissipative coupling involving the momentum, instead of the coordinate: the… (More)

- Luca Capriotti, Alessandro Cuccoli, A. Fubini, V. Tognetti, Ruggero Vaia
- Physical review letters
- 2003

The phase diagram of a 2D Josephson junction array with large substrate resistance, described by a quantum XY model, is studied by means of Fourier path-integral Monte Carlo. A genuine… (More)

- Ruggero Vaia
- Physical review. E
- 2018

Almost-dispersionless pulse transfer between the extremal masses of a uniform harmonic spring-mass chain of arbitrary length can be induced by suitably modifying two masses and their spring's elastic… (More)

- Luca Capriotti, Alessandro Cuccoli, A. Fubini, V. Tognetti, Ruggero Vaia
- Physical review letters
- 2005

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 Josephson junction array,… (More)

We consider quantum Heisenberg ferroand antiferromagnets on the square lattice with exchange anisotropy of easy-plane or easy-axis type. The thermodynamics and the critical behaviour of the models… (More)

- Paolo Politi, Ruggero Vaia
- 2006

Recent work on the dynamics of a crystal surface [T. Frisch and A. Verga, Phys. Rev. Lett. 96, 166104 (2006)] has focused the attention on the conserved KuramotoSivashinsky (CKS) equation: ∂tu =… (More)

The Double Sine-Gordon (DSG) model has been often used for describing anisotropic spin chains. We firstly present classical transfer matrix calculations of thermodynamic quantities. Secondly, the… (More)