Search results for "structured environments"

showing 3 items of 3 documents

Towards a Methodology for Designing Artificial Conscious Robotic Systems

2009

Engineering artificial conscious robotic systems, able to perceive, think and act in an unstructured environment is a very challenging issue. Basing on the results of the experiences made in the latest years about modeling the perception loop of a robot and about the creation of ad-hoc methodologies for engineering complex systems, we developed an initial model of an artificial conscious system and extended a well known methodology (PASSI) for engineering the elements we identified as composing such a system. Copyright © 2009, Association for the Advancement of Artificial Intelligence. All rights reserved.

Complex systemUnstructured environmentsRobotic system
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van der Waals interactions between excited atoms in generic environments

2015

We consider the the van der Waals force involving excited atoms in general environments, constituted by magnetodielectric bodies. We develop a dynamical approach studying the dynamics of the atoms and the field, mutually coupled. When only one atom is excited, our dynamical theory suggests that for large distances the van der Waals force acting on the ground-state atom is monotonic, while the force acting in the excited atom is spatially oscillating. We show how this latter force can be related to the known oscillating Casimir--Polder force on an excited atom near a (ground-state) body. Our force also reveals a population-induced dynamics: for times much larger that the atomic lifetime the …

Condensed Matter::Quantum GasesPhysicsQuantum PhysicsField (physics)Van der Waals forceVan der Waals strainVan der Waals surfaceFOS: Physical sciencesCasimir-Polder interaction01 natural sciencesLondon dispersion forcestructured environments010305 fluids & plasmassymbols.namesakeExcited state0103 physical sciencesAtomPhysics::Atomic and Molecular ClusterssymbolsVan der Waals radiusPhysics::Atomic Physicsvan der Waals forceAtomic physicsQuantum Physics (quant-ph)010306 general physicsPhysical Review A
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Control of spontaneous emission of a single quantum emitter through a time-modulated photonic-band-gap environment

2017

We consider the spontaneous emission of a two-level quantum emitter, such as an atom or a quantum dot, in a modulated time-dependent environment with a photonic band gap. An example of such an environment is a dynamical photonic crystal or any other environment with a bandgap whose properties are modulated in time, in the effective mass approximation. After introducing our model of dynamical photonic crystal, we show that it allows new possibilities to control and tailor the physical features of the emitted radiation, specifically its frequency spectrum. In the weak coupling limit and in an adiabatic case, we obtain the emitted spectrum and we show the appearance of two lateral peaks due to…

PhysicsQuantum PhysicsBand gapFOS: Physical sciences02 engineering and technologyRadiative processes Structured environments Spontaneous emission Photonic crystals021001 nanoscience & nanotechnology01 natural sciences3. Good healthQuantum dot0103 physical sciencesAtomRadiative transferDensity of statesSpontaneous emissionAtomic physics010306 general physics0210 nano-technologyAdiabatic processQuantum Physics (quant-ph)Photonic crystal
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