Zobrazeno 1 - 10
of 365
pro vyhledávání: '"Castaños, O"'
A parametrization of density matrices of $d$ dimensions in terms of the raising $J_+$ and lowering $J_-$ angular momentum operators is established together with an implicit connection with the generalized Bloch-GellMann parameters. A general expressi
Externí odkaz:
http://arxiv.org/abs/2411.16875
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
The dynamics of the interaction between an atom of three levels interacting with a quantized field of two modes in a cavity is studied within the rotating wave approximation, by taking into account experimental values of the accessible hyperfine leve
Externí odkaz:
http://arxiv.org/abs/2401.04892
The time evolution of a wave packet is a tool to detect topological phase transitions in two-dimensional Dirac materials, such as graphene and silicene. Here we extend the analysis to HgTe/CdTe quantum wells and study the evolution of their electron
Externí odkaz:
http://arxiv.org/abs/2401.03884
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
Publikováno v:
SciPost Phys. 16, 077 (2024)
We analyze the magneto-optical conductivity (and related magnitudes like transmittance and Faraday rotation of the irradiated polarized light) of some elemental two-dimensional Dirac materials of group IV (graphene analogues, buckled honeycomb lattic
Externí odkaz:
http://arxiv.org/abs/2305.14923
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 consider a four-parametric $(a, b, \alpha, \beta)$ family of Volterra quadratic stochastic operators for a bisexual population (i.e., each organism of the population must belong either to the female sex or the male sex). We show that independently
Externí odkaz:
http://arxiv.org/abs/1808.01812