61 citations · 547 across the 49 of their papers we have counts for
5 papers · 2 filters
Mean field description of the Dicke Model
Jorge G. Hirsch, Octavio Castanos, Ramon Lopez-Pena +1
A mean field description of the Dicke model is presented, employing the Holstein-Primakoff realization of the angular momentum algebra. It is shown that, in the thermodynamic limit…
On the Relativistic Invariance of Entanglement
Esteban Castro-Ruiz, Eduardo Nahmad-Achar
In this work we study the entanglement properties under a Lorentz boost of a pair of spin- 1 massive particles, with spin and momentum as the sole degrees of freedom of the system.…
On the Spectrum of Field Quadratures for a Finite Number of Photons
Emilio Pisanty, Eduardo Nahmad-Achar
The spectrum and eigenstates of any field quadrature operator restricted to a finite number of photons are studied, in terms of the Hermite polynomials. By (naturally) defining…
On the Superradiant Phase in Field-Matter Interactions
O. Castaños, E. Nahmad-Achar, R. López-Peña +1
We show that semi-classical states adapted to the symmetry of the Hamiltonian are an excellent approximation to the exact quantum solution of the ground and first excited states of…
No singularities at the phase transition in the Dicke model
O. Casta~nos, E. Nahmad-Achar, R. Lopez-Peña +1
The Dicke Hamiltonian describes the simplest quantum system with atoms interacting with photons: N two level atoms inside a perfectly reflecting cavity which allows only one electr…