Search results for "Electron devices"

showing 3 items of 3 documents

Time-energy filtering of single electrons in ballistic waveguides

2019

Characterizing distinct electron wave packets is a basic task for solid-state electron quantum optics with applications in quantum metrology and sensing. A important circuit element for this task is a non-stationary potential barrier than enables backscattering of chiral particles depending on their energy and time of arrival. Here we solve the quantum mechanical problem of single-particle scattering by a ballistic constriction in an fully depleted quantum Hall system under spatially uniform but time-dependent electrostatic potential modulation. The result describes electrons distributed in time-energy space according to a modified Wigner quasiprobability distribution and scattered with an …

PhysicsQuantum opticsCondensed Matter - Mesoscale and Nanoscale PhysicsWigner quasiprobability distributionWave packet500 Naturwissenschaften und Mathematik::530 Physik::530 PhysikGeneral Physics and AstronomyFOS: Physical sciencesElectronQuantum tomographyQuantum Hall effect01 natural sciences530010305 fluids & plasmasComputational physicsquantum state tomography0103 physical sciencesMesoscale and Nanoscale Physics (cond-mat.mes-hall)time-dependent scatteringQuantum metrologyWigner distribution functionelectron quantum optics010306 general physicssingle-electron devices
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Quasi-digital conversion for resistive devices: application in GMR-based IC current sensors

2013

Resistive devices, including sensors, are used in a huge range of applications within different scenarios. When a complete system is considered, a quasi-digital output is often recommendable. If the conversion is operated at device level, some problems such as noise disturbs, insertion losses and so on, can be reduced. In this work, we describe a resistance-tofrequency (R-f) converter with a suggested application in low current monitoring by means of GiantMagnetoResistance (GMR) sensors. Specific devices have been designed and microfabricated. The system has been tested by means of discrete components with a PCB. The complete microsystem monolithic integration in a standard CMOS technology …

EngineeringElectric current measurementAnalog IC; Current measurement; GMR sensor; Oscillator; Resistance-to-frequency converter; Hardware and Architecture; Electrical and Electronic EngineeringOscillators (electronic)Noise (electronics)Electron devices:Enginyeria electrònica::Instrumentació i mesura::Sensors i actuadors [Àrees temàtiques de la UPC]Polychlorinated biphenylsMicrosystemElectronic engineeringOscillatorDigital conversionElectrical and Electronic EngineeringGMR sensorResistive touchscreenbusiness.industrySensorsElectrical engineeringElectromagnetisme -- MesuramentsAnalog ICResistance-to-frequency converterCMOS integrated circuitsCurrent measurementCMOSHardware and ArchitectureElectromagnetic measurementsvisual_artElectronic componentvisual_art.visual_art_mediumCurrent (fluid)business
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Synchronization of coupled single-electron circuits based on nanoparticles and tunneling junctions

2009

We explore theoretically the synchronization properties of a device composed of coupled single-electron circuits whose building blocks are nanoparticles interconnected with tunneling junctions. Elementary nanoscillators can be achieved by a single-electron tunneling cell where the relaxation oscillation is induced by the tunneling. We develop a model to describe the synchronization of the nanoscillators and present sample calculations to demonstrate that the idea is feasible and could readily find applications. Instead of considering a particular system, we analyze the general properties of the device making use of an ideal model that emphasizes the essential characteristics of the concept.…

CouplingPhysicsCondensed matter physicsOscillationNanoelectronicsUNESCO::FÍSICAGeneral Physics and AstronomyPhase synchronizationTopologySynchronizationTunnellingNanoelectronicsNanoelectronics ; Nanoparticles ; Oscillators ; Single electron devices ; Synchronisation ; TunnellingSynchronisation:FÍSICA [UNESCO]NanoparticlesOscillatorsRelaxation (approximation)Single electron devicesQuantum tunnellingElectronic circuitJournal of Applied Physics
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