66 citations · 74 across the 2 of their papers we have counts for
11 papers
Fidelity, susceptibility and critical exponents in the Dicke model
M. A. Bastarrachea-Magnani, O. Castaños, E. Nahmad-Achar +2
We calculate numerically the fidelity and its susceptibility for the ground state of the Dicke model. A minimum in the fidelity identifies the critical value of the interaction whe…
Neutrinoless decay transition matrix elements within mechanisms involving light Majorana neutrinos, classical Majorons and sterile neutrinos
P. K. Rath, R. Chandra, K. Chaturvedi +3
In the PHFB model, uncertainties in the nuclear transition matrix elements for the neutrinoless double- decay of Zr, Mo, Ru, Pd, $^{128,13…
Phase transitions with finite atom number in the Dicke Model
J. G. Hirsch, O. Castaños, E. Nahmad-Achar +1
Two-level atoms interacting with a one mode cavity field at zero temperature have order parameters which reflect the presence of a quantum phase transition at a critical value of t…
Uncertainties in nuclear transition matrix elements for neutrinoless decay II: the heavy Majorana neutrino mass mechanism
P. K. Rath, R. Chandra, P. K. Raina +2
Employing four different parametrization of the pairing plus multipolar type of effective two-body interaction and three different parametrizations of Jastrow-type of short range c…
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…
Uncertainties in nuclear transition matrix elements for neutrinoless decay within the PHFB model
P. K. Rath, R. Chandra, K. Chaturvedi +2
The nuclear transition matrix elements for the neutrinoless double beta decay of Zr, Mo, Ru, Pd, Te and Nd isoto…