dc.contributor.author
Fletcher, J. D.
dc.contributor.author
Johnson, N.
dc.contributor.author
Locane, E.
dc.contributor.author
See, P.
dc.contributor.author
Griffiths, J. P.
dc.contributor.author
Farrer, I.
dc.contributor.author
Ritchie, D. A.
dc.contributor.author
Brouwer, P. W.
dc.contributor.author
Kashcheyevs, V.
dc.contributor.author
Kataoka, M.
dc.date.accessioned
2019-12-13T10:09:07Z
dc.date.available
2019-12-13T10:09:07Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/26225
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-25985
dc.description.abstract
A method for characterising the wave-function of freely-propagating particles would provide a useful tool for developing quantum-information technologies with single electronic excitations. Previous continuous-variable quantum tomography techniques developed to analyse electronic excitations in the energy-time domain have been limited to energies close to the Fermi level. We show that a wide-band tomography of single-particle distributions is possible using energy-time filtering and that the Wigner representation of the mixed-state density matrix can be reconstructed for solitary electrons emitted by an on-demand single-electron source. These are highly localised distributions, isolated from the Fermi sea. While we cannot resolve the pure state Wigner function of our excitations due to classical fluctuations, we can partially resolve the chirp and squeezing of the Wigner function imposed by emission conditions and quantify the quantumness of the source. This tomography scheme, when implemented with sufficient experimental resolution, will enable quantum-limited measurements, providing information on electron coherence and entanglement at the individual particle level.
en
dc.rights.uri
https://creativecommons.org/licenses/by/4.0/
dc.subject
Electronic and spintronic devices
en
dc.subject
Nanoscale devices
en
dc.subject
Quantum dots
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::510 Mathematik::510 Mathematik
dc.title
Continuous-variable tomography of solitary electrons
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.articlenumber
5298
dcterms.bibliographicCitation.doi
10.1038/s41467-019-13222-1
dcterms.bibliographicCitation.journaltitle
Nature Communications
dcterms.bibliographicCitation.volume
10
dcterms.bibliographicCitation.url
https://doi.org/10.1038/s41467-019-13222-1
refubium.affiliation
Mathematik und Informatik
refubium.affiliation.other
Dahlem Center für komplexe Quantensysteme
![Dieser Normdateneintrag wurde von einer Benutzerin oder einem Benutzer als gültig bestätigt.](/cache_202e45ad85b55efaeb29160f63cd3f3b/themes/FuCD/images/authority_control/invisible.gif)
refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.eissn
2041-1723