45 citations · 148 across the 11 of their papers we have counts for
11 papers
On the finite size behavior of quantum collective spin systems
Giuseppe Liberti, Franco Piperno, Francesco Plastina
We discuss the finite size behavior of the adiabatic Dicke model, describing the collective coupling of a set of N-two level atoms (qubits) to a faster (electromagnetic) oscillator…
Entanglement sharing in Jahn-Teller model in the presence of a magnetic field
G. Liberti, R. L. Zaffino, F. Piperno +1
We discuss the ground state entanglement of the Jahn-Teller model in the presence of a strong transverse magnetic field as a function of the vibronic coupling strength.…
Scaling of Berry's Phase Close to the Dicke Quantum Phase Transition
Francesco Plastina, Giuseppe Liberti, Angelo Carollo
We discuss the thermodynamic and finite size scaling properties of the geometric phase in the adiabatic Dicke model, describing the super-radiant phase transition for an qubit…
Scaling behavior in the adiabatic Dicke Model
G. Liberti, F. Plastina, F. Piperno
We analyze the quantum phase transition for a set of -two level systems interacting with a bosonic mode in the adiabatic regime. Through the Born-Oppenheimer approximation, we o…
Entanglement of a qubit coupled to a resonator in the adiabatic regime
G. Liberti, R. L. Zaffino, F. Piperno +1
We discuss the ground state entanglement of a bi-partite system, composed by a qubit strongly interacting with an oscillator mode, as a function of the coupling strenght, the trans…
Reply to "Comment on equivalence between quantum phase transition phenomena in radiation-matter and magnetic systems"
Giuseppe Liberti, Rosa Letizia Zaffino
A short Reply to the Comment of Brankov, Tonchev and Zagrebnov, quant-ph/0506207, is given.