Details
| Original language | English |
|---|---|
| Pages (from-to) | 733-740 |
| Number of pages | 8 |
| Journal | Nature nanotechnology |
| Volume | 18 |
| Issue number | 7 |
| Early online date | 11 May 2023 |
| Publication status | Published - Jul 2023 |
| Externally published | Yes |
Abstract
The nonlinear response of a beam splitter to the coincident arrival of interacting particles enables numerous applications in quantum engineering and metrology. Yet, it poses considerable challenges to control interactions on the individual particle level. Here, we probe the coincidence correlations at a mesoscopic constriction between individual ballistic electrons in a system with unscreened Coulomb interactions and introduce concepts to quantify the associated parametric nonlinearity. The full counting statistics of joint detection allows us to explore the interaction-mediated energy exchange. We observe an increase from 50% up to 70% in coincidence counts between statistically indistinguishable on-demand sources and a correlation signature consistent with the independent tomography of the electron emission. Analytical modelling and numerical simulations underpin the consistency of the experimental results with Coulomb interactions between two electrons counterpropagating in a quadratic saddle potential. Coulomb repulsion energy and beam splitter dispersion define a figure of merit, which in this experiment is demonstrated to be sufficiently large to enable future applications, such as single-shot in-flight detection and quantum logic gates.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Condensed Matter Physics
- Chemical Engineering(all)
- Bioengineering
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
- Materials Science(all)
- General Materials Science
- Engineering(all)
- Electrical and Electronic Engineering
- Engineering(all)
- Biomedical Engineering
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Nature nanotechnology, Vol. 18, No. 7, 07.2023, p. 733-740.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Two electrons interacting at a mesoscopic beam splitter
AU - Ubbelohde, Niels
AU - Freise, Lars
AU - Pavlovska, Elina
AU - Silvestrov, Peter G.
AU - Recher, Patrik
AU - Kokainis, Martins
AU - Barinovs, Girts
AU - Hohls, Frank
AU - Weimann, Thomas
AU - Pierz, Klaus
AU - Kashcheyevs, Vyacheslavs
N1 - Publisher Copyright: © 2023, The Author(s), under exclusive licence to Springer Nature Limited.
PY - 2023/7
Y1 - 2023/7
N2 - The nonlinear response of a beam splitter to the coincident arrival of interacting particles enables numerous applications in quantum engineering and metrology. Yet, it poses considerable challenges to control interactions on the individual particle level. Here, we probe the coincidence correlations at a mesoscopic constriction between individual ballistic electrons in a system with unscreened Coulomb interactions and introduce concepts to quantify the associated parametric nonlinearity. The full counting statistics of joint detection allows us to explore the interaction-mediated energy exchange. We observe an increase from 50% up to 70% in coincidence counts between statistically indistinguishable on-demand sources and a correlation signature consistent with the independent tomography of the electron emission. Analytical modelling and numerical simulations underpin the consistency of the experimental results with Coulomb interactions between two electrons counterpropagating in a quadratic saddle potential. Coulomb repulsion energy and beam splitter dispersion define a figure of merit, which in this experiment is demonstrated to be sufficiently large to enable future applications, such as single-shot in-flight detection and quantum logic gates.
AB - The nonlinear response of a beam splitter to the coincident arrival of interacting particles enables numerous applications in quantum engineering and metrology. Yet, it poses considerable challenges to control interactions on the individual particle level. Here, we probe the coincidence correlations at a mesoscopic constriction between individual ballistic electrons in a system with unscreened Coulomb interactions and introduce concepts to quantify the associated parametric nonlinearity. The full counting statistics of joint detection allows us to explore the interaction-mediated energy exchange. We observe an increase from 50% up to 70% in coincidence counts between statistically indistinguishable on-demand sources and a correlation signature consistent with the independent tomography of the electron emission. Analytical modelling and numerical simulations underpin the consistency of the experimental results with Coulomb interactions between two electrons counterpropagating in a quadratic saddle potential. Coulomb repulsion energy and beam splitter dispersion define a figure of merit, which in this experiment is demonstrated to be sufficiently large to enable future applications, such as single-shot in-flight detection and quantum logic gates.
UR - http://www.scopus.com/inward/record.url?scp=85159362124&partnerID=8YFLogxK
U2 - 10.48550/arXiv.2210.03632
DO - 10.48550/arXiv.2210.03632
M3 - Article
VL - 18
SP - 733
EP - 740
JO - Nature nanotechnology
JF - Nature nanotechnology
SN - 1748-3395
IS - 7
ER -