Zobrazeno 1 - 10
of 162
pro vyhledávání: '"López Peña, R."'
The principle of maximum entropy is used to study the geometric properties of an ensemble of finite dimensional Hamiltonian systems with known average energy. These geometric characterization is given in terms of the generalized diagonal Bloch vector
Externí odkaz:
http://arxiv.org/abs/2405.01759
A method for storing quantum information is presented for $3$-level atomic systems interacting dipolarly with a single radiation field. The method involves performing simple local SU(2) rotations on the Hamiltonian. Under equal detuning, these transf
Externí odkaz:
http://arxiv.org/abs/2306.00105
We show that the behaviour in phase space of the Wigner function associated to the electromagnetic modes carries the information of both, the entanglement properties between matter and field, and the regions in parameter space where quantum phase tra
Externí odkaz:
http://arxiv.org/abs/2302.09209
Publikováno v:
J. Phys. A: Math. Theor. 55 (2022) 485302
The quantum phase diagram for a finite $3$-level system in the $\Lambda$ configuration, interacting with a two-mode electromagnetic field in a cavity, is determined by means of information measures such as fidelity, fidelity susceptibility and entang
Externí odkaz:
http://arxiv.org/abs/2302.09204
Publikováno v:
Phys. Rev. A 100, 053810 (2019)
A methodology is devised for building optimal bases for the generalized Dicke model based on the symmetry adapted variational solution to the problem. At order zero, the matter sector is constructed by distributing $N_a$ particles in all the possible
Externí odkaz:
http://arxiv.org/abs/1905.13333
We establish a novel procedure to analyze the entanglement properties of extremal density matrices depending on the parameters of a finite dimensional Hamiltonian. It was applied to a general 2-qubit Hamiltonian which could exhibit Kramers degeneracy
Externí odkaz:
http://arxiv.org/abs/1807.00227
Publikováno v:
Phys. Rev. A 97, 013808 (2018)
A dynamic procedure is established within the generalised Tavis-Cummings model to generate light states with discrete point symmetries, given by the cyclic group ${\cal C}_n$. We consider arbitrary dipolar coupling strengths of the atoms with a one-m
Externí odkaz:
http://arxiv.org/abs/1701.07816
Publikováno v:
Phys. Rev. A 94, 013802 (2016)
A study of the $\lambda$- and $N$-atomic configurations under dipolar interaction with $2$ modes of electromagnetic radiation is presented. The corresponding quantum phase diagrams are obtained by means of a variational procedure. Both configurations
Externí odkaz:
http://arxiv.org/abs/1603.05242
Publikováno v:
Phys. Scr. 90 (2015) 068016
We introduce a combination of coherent states as variational test functions for the atomic and radiation sectors to describe a system of Na three- level atoms interacting with a one-mode quantised electromagnetic field, with and without the rotating
Externí odkaz:
http://arxiv.org/abs/1510.06308
The energy spectrum of a system of $N_a$ atoms of $n$ levels interacting with a one-mode electromagnetic field is studied in the dipole and rotating wave approximations. We find that, under the resonant condition, it exhibits a mirror symmetry with r
Externí odkaz:
http://arxiv.org/abs/1403.3840