0000000000215213

AUTHOR

Lukas Fricke

showing 3 related works from this author

Partitioning of on-demand electron pairs

2014

The on-demand generation and separation of entangled photon pairs are key components of quantum information processing in quantum optics. In an electronic analogue, the decomposition of electron pairs represents an essential building block for using the quantum state of ballistic electrons in electron quantum optics. The scattering of electrons has been used to probe the particle statistics of stochastic sources in Hanbury Brown and Twiss experiments and the recent advent of on-demand sources further offers the possibility to achieve indistinguishability between multiple sources in Hong-Ou-Mandel experiments. Cooper pairs impinging stochastically at a mesoscopic beamsplitter have been succe…

PhysicsQuantum networkElectron pairCondensed Matter - Mesoscale and Nanoscale PhysicsBiomedical EngineeringFOS: Physical sciencesQuantum simulatorBioengineeringQuantum PhysicsElectronCondensed Matter PhysicsAtomic and Molecular Physics and OpticsOpen quantum systemQuantum dotQuantum mechanicsMesoscale and Nanoscale Physics (cond-mat.mes-hall)Computer Science::Programming LanguagesGeneral Materials ScienceQuantum algorithmElectrical and Electronic EngineeringQuantum informationComputer Science::DatabasesNature Nanotechnology
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Quantized current source with mesoscopic feedback

2011

We study a mesoscopic circuit of two quantized current sources, realized by nonadiabatic single-electron pumps connected in series with a small micron-sized island in between. We find that quantum transport through the second pump can be locked onto the quantized current of the first one by a feedback due to charging of the mesoscopic island. This is confirmed by a measurement of the charge variation on the island using a nearby charge detector. Finally, the charge feedback signal clearly evidences loading into excited states of the dynamic quantum dot during single-electron pump operation. © 2011 American Physical Society.

PhysicsMesoscopic physicsMesoscopic circuitCondensed Matter - Mesoscale and Nanoscale PhysicsDetectorFOS: Physical sciencesCharge (physics)02 engineering and technologyElectronCurrent source021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciencesSignalElectronic Optical and Magnetic MaterialsQuantum dotExcited stateMesoscale and Nanoscale Physics (cond-mat.mes-hall)0103 physical sciencesddc:530Dewey Decimal Classification::500 | Naturwissenschaften::530 | PhysikAtomic physics010306 general physics0210 nano-technologyPhysical Review B
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Counting statistics for electron capture in a dynamic quantum dot

2012

We report non-invasive single-charge detection of the full probability distribution $P_n$ of the initialization of a quantum dot with $n$ electrons for rapid decoupling from an electron reservoir. We analyze the data in the context of a model for sequential tunneling pinch-off, which has generic solutions corresponding to two opposing mechanisms. One limit considers sequential "freeze out" of an adiabatically evolving grand canonical distribution, the other one is an athermal limit equivalent to the solution of a generalized decay cascade model. We identify the athermal capturing mechanism in our sample, testifying to the high precision of our combined theoretical and experimental methods. …

Canonical ensemblePhysicsCondensed Matter - Mesoscale and Nanoscale PhysicsElectron captureGeneral Physics and AstronomyInitializationFOS: Physical sciencesDecoupling (cosmology)ElectronCascadeQuantum dotQuantum mechanicsMesoscale and Nanoscale Physics (cond-mat.mes-hall)Probability distribution
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