Zobrazeno 1 - 10
of 765
pro vyhledávání: '"P. Castaños"'
Zero energy eigenstates $\psi_0(\theta)$ of the twisted bilayer graphene Hamiltonian at the Dirac point show a high sensitivity to the twist angle $\theta$ near the magic angles where the effective Fermi velocity vanishes. We use information theory m
Externí odkaz:
http://arxiv.org/abs/2409.07935
In this paper, we apply the recently developed generalized parameter estimation-based observer design technique for state-affine systems to the practically important case of linear time-varying descriptor systems with uncertain parameters. We give si
Externí odkaz:
http://arxiv.org/abs/2407.14373
Autor:
Calixto, Manuel, Castaños, Octavio
Localization and entanglement properties of edge states of HgTe quantum wells in a finite strip geometry of width $L$ are studied under quantum information concepts such as: 1) inverse participation ratio (IPR), which measures localization, and 2) en
Externí odkaz:
http://arxiv.org/abs/2407.12469
We construct the vector field associated with the GKLS generator for systems described by Gaussian states. This vector field is defined on the dual space of the algebra of operators, restricted to operators quadratic in position and momentum. It is s
Externí odkaz:
http://arxiv.org/abs/2405.10282
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
Publikováno v:
J. Phys. A: Math. Theor. vol 57 (2024) 345301
We consider a one-dimensional membrane-in-the-middle model for a cavity that consists of two fixed, perfect mirrors and a mobile dielectric membrane between them that has a constant electric susceptibility. We present a sequence of exact cavity angul
Externí odkaz:
http://arxiv.org/abs/2312.09127
In this work, we uncover new features on the study of a two-level atom interacting with one of two cavities in a coherent superposition. The James-Cummings model is used to describe the atom-field interaction and to study the effects of quantum indef
Externí odkaz:
http://arxiv.org/abs/2312.06984
Publikováno v:
Phys. Rev. E \textbf{109}, 054128 (2024)
A quantum random walk model is established on a one-dimensional periodic lattice that fluctuates between two possible states. This model is defined by Lindblad rate equations that incorporate the transition rates between the two lattice states. Lever
Externí odkaz:
http://arxiv.org/abs/2311.15713