Scaling behavior of the adiabatic Dicke model
Giuseppe Di Liberti, Francesco Plastina, Franco Piperno · Physical Review A · 2006
We analyze the quantum phase transition for a set of $N$ two-level systems interacting with a bosonic mode in the adiabatic regime. Through the Born-Oppenheimer approximation, we obtain the finite-size scaling expansion for many physical observables and, in particular, for the entanglement content of the system.