23 citations · 194 across the 38 of their papers we have counts for
7 papers · 1 filter
Event detection in Colombian security Twitter news using fine-grained latent topic analysis
Vladimir Vargas-Calderón, Nicolás Parra-A., Jorge E. Camargo +1
Cultural and social dynamics are important concepts that must be understood in order to grasp what a community cares about. To that end, an excellent source of information on what…
Using machine learning and information visualisation for discovering latent topics in Twitter news
Vladimir Vargas-Calderón, Marlon Steibeck Dominguez, N. Parra-A. +2
We propose a method to discover latent topics and visualise large collections of tweets for easy identification and interpretation of topics, and exemplify its use with tweets from…
Light emission properties in a double quantum dot molecule immersed in a cavity: phonon-assisted tunneling
Vladimir Vargas-Calderón, Herbert Vinck-Posada
Two main mechanisms dictate the tunneling process in a double quantum dot: overlap of excited wave functions, effectively described as a tunneling rate, and phonon-assisted tunneli…
Generation of matter threefold star state by dynamical transfer from photonic counterpart
J. P. Restrepo Cuartas, M. Cardona-Rincón, H. Vinck-Posada
In this paper, the dynamics of a system composed by an assembly of two-level atoms coupled to a single-mode cavity is theoretically studied considering the Tavis-Cummings Hamiltoni…
Effective quasiparticle approach for a Cavity-QDots System
F. Gómez, J. P. Restrepo Cuartas, B. A. Rodríguez Rey +1
In this work, we present a quasiparticle strategy to study the Hamiltonian description of the stationary states for two quantum dots--cavity system. We consider three different eff…
Pure dephasing vs. Phonon mediated off-resonant coupling in a quantum-dot-cavity system
Santiago Echeverri-Arteaga, Herbert Vinck-Posada, José M. Villas-Bôas +1
Pure dephasing is widely used in the literature to explain experimental observations on quantum dots in cavities. In many cases, its use is not enough and extra terms need to be "f…