A5059921909- Semiconductor Quantum Structures and Devices
- Strong Light-Matter Interactions
- Quantum and electron transport phenomena
- Quantum Information and Cryptography
- Photonic and Optical Devices
- Semiconductor Lasers and Optical Devices
- Photonic Crystals and Applications
- Quantum Mechanics and Applications
- Advanced Thermodynamics and Statistical Mechanics
- Cold Atom Physics and Bose-Einstein Condensates
- Knowledge Societies in the 21st Century
- Quantum optics and atomic interactions
- Quantum Computing Algorithms and Architecture
- Thermal Radiation and Cooling Technologies
- Molecular Junctions and Nanostructures
- Mechanical and Optical Resonators
- Climate variability and models
- Advanced Electron Microscopy Techniques and Applications
- COVID-19 epidemiological studies
- Electron and X-Ray Spectroscopy Techniques
- Complex Systems and Time Series Analysis
- Engineering and Information Technology
- Gene Regulatory Network Analysis
- Educational Research and Science Teaching
- Gene expression and cancer classification
Universidad de Antioquia
2015-2024
Universidad Nacional de Colombia
1996-2016
Bechtel (United States)
2014
Fundación Ciencias Exactas y Naturales
2013
Municipality of Medellín
2013
Instituto de Cibernética Matemática y Física
2010
The relation between the dynamical regimes (weak and strong coupling) entanglement for a dissipative quantum dot microcavity system is studied. In framework of phenomenological temperature model an analysis in both temporal (population dynamics) frequency domain (photoluminescence) carried out order to identify associated behavior. Wigner function concurrence are employed quantify each regime. We find that sudden death typical characteristic coupling
Exciton polaritons are coupled states of matter and light, originated by the strong interaction between an optical mode semiconductor excitons. This can be obtained also at a single-particle level, in which case it has been shown that quantum treatment is mandatory. In this work we study light-matter entanglement from fully formalism including pumping dissipation. We find completely destroyed if exciton photon tuned resonance condition, even under very low rates. Instead, best condition for...
The relative intensity of photonic modes in microcavity pillars with embedded self-assembled quantum dots is shown to be a sensitive function dot dipole orientation and position. This deduced from comparison experiment calculated intensities light emission for many nominally identical pillars. We are able obtain the overall degree in-plane polarization ensemble also information on along growth axis.
The effects of confinement and magnetic fields on the effective electron Landé g factor GaAs–Ga1−xAlxAs cylindrical quantum well wires are studied. Calculations were carried out via Ogg–McCombe Hamiltonian which is used to describe non-parabolicity anisotropy states in conduction band. applied field taken along wire axis, Schrödinger equation corresponding spin projections parallel antiparallel solved by using an expansion wavefunctions terms two-dimensional harmonic oscillator...
We investigate the effects of considering two different incoherent excitation mechanisms on microcavity quantum dot systems modeled using Jaynes–Cummings Hamiltonian. When system is incoherently pumped with polaritons it able to sustain a large number photons inside cavity Poisson-like statistics in stationary limit, and also leads separable exciton–photon state. both types pumpings (excitonic polaritonic) emission spectrum cavity. show that polaritonic pumping considered here unable modify...
We revisit the problem of dynamics quantum correlations in exact Tavis-Cummings model. show that many dynamical features discord attributed to dissipation are already present framework and due well known non-linearities model choice initial conditions. Through a comprehensive analysis, supported by explicit analytical calculations, we find entanglement far from being trivial or intuitive. In this context, states indistinguishable point view distinguishable discord, where two quantifiers give...
We show that the combined effect of photon emission and Coulomb interactions may drive an exciton-polariton system towards a dynamical coherent state, even without phonon thermalization or any other relaxation mechanism. Exact diagonalization results for finite (a multilevel quantum dot interacting with lowest-energy mode microcavity) are presented in support this statement.
Laboratory experiments that illustrate the fundamentals of quantum physics are powerful teaching instruments because they re-enact thought experiments, allowing students to think deeper about quantum-mechanical principles involved. Interference, wave–particle duality and entanglement among most important predictions mechanics. They abstract counter-intuitive. More recent concepts help these subtleties include erasure delayed choice. In this article we present an experiment for undergraduate...
Dipolaritons are quasiparticles that arise in coupled quantum wells embedded a microcavity, they superposition of photon, direct exciton and an indirect exciton. We propose the existence dipolaritons system two dots inside microcavity analogy with well case find that, despite some similarities, have different properties can lead to true dark polariton states. use finite theory study effects magnetic field on system, including emission, it be used as control parameter excitons dipolaritons,...
La mecánica cuántica fundamental (MCF) es una exposición comentada de los experimentos y conceptos fundamentales la cuántica, que teoría física del dominio cuántico fenómenos: el principio superposición entrelazamiento se proponen como fundamento teórico descripción cuántica. De estas nociones base presenta su formalismo para sistemas dos niveles. También exponen las ideas probabilidad, evolución (dinámica) medición con fin plantear problema medición. Finalmente, esta construcción teórica...
We present a study of the strong coupling between radiation and matter, considering system two quantum dots, which are in mutual interaction interacting with single mode light confined semiconductor nanocavity. take into account dissipative mechanisms such as escape cavity photons, decay dot excitons by spontaneous emission, independent exciton pumping. It is shown that dots can be measured off-resonance, only if condition reached. Using regression theorem, reasonable definition dynamical...
The semiclassical theory of electrical susceptibility predicts null even-order susceptibilities for all centrosymmetric materials. However, second harmonic generation and other nonlinear optical phenomena are often seen in them. Contributions due to magnetic dipoles, bulk quadrupoles, or symmetry ruptures describe many these effects, but not them, as can be some experiments recalled here. This work presents an extension the that renders more general expressions susceptibilities. According...
<title>Abstract</title> The hypothalamus senses the appetite-regulating hormones and also coordinates metabolic function in alignment with circadian rhythm. This is essential to maintain physiological conditions that prevent clinically important comorbidities, such as obesity or type-2 diabetes. However, a complete model of relates food intake rhythms appetite has not yet been developed. In this work, we present computational accurately allows interpreting neural activity terms hormone...
Abstract Giant viruses have been in the scope of virologists since 2003 when they were isolated from Acanthamoeba spp. viruses, turn, get infected by another virus named virophage and a third biological entity that corresponds to transpoviron which can be found capsids giant viruses. So far, transpovirons seem behave as commensal entities while some virophages exhibit behavior under laboratory conditions. To study system’s behavior, we used theoretical approximation developed an ordinary...