Two electrons interacting at a mesoscopic beam splitter
arXiv:2210.03632 · doi:10.1038/s41565-023-01370-x
Abstract
The non-linear response of a beam splitter to the coincident arrival of interacting particles enables numerous applications in quantum engineering and metrology yet poses considerable challenge to achieve focused 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 non-linearity. 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 independent tomography of the electron emission. Analytical modeling and numerical simulations underpin consistency of the experimental results with Coulomb interactions between two electrons counterpropagating in a dispersive quadratic saddle, and demonstrate interactions sufficiently strong, , to enable single-shot in-flight detection and quantum logic gates.
References in corpus (12)
- Coherence and Indistinguishability of Single Electrons Emitted by Independent Sources
- An atomic Hong-Ou-Mandel experiment
- Hong-Ou-Mandel experiment for temporal investigation of single electron fractionalization
- Partitioning of on-demand electron pairs
- Decoherence and relaxation of a single electron in a one dimensional conductor
- Ultrafast Emission and Detection of a Single-Electron Gaussian Wave Packet: A Theoretical Study
- Relaxation of hot electrons in a degenerate two-dimensional electron system: transition to one-dimensional scattering
- Spectroscopic study on hot-electron transport in a quantum Hall edge channel
- Coulomb and exchange interaction effects on the exact two-electron dynamics in the Hong-Ou-Mandel interferometer based on Hall edge states
- Partition of Two Interacting Electrons by a Potential Barrier
- Semiconductor-based electron flying qubits: Review on recent progress accelerated by numerical modelling
- Time-resolved Coulomb collision of single electrons
Cited by in corpus (21)
- Emission and Coherent Control of Levitons in Graphene
- Ultrashort electron wavepackets via frequency-comb synthesis
- Electron qubits surfing on acoustic waves: review of recent progress
- Heat Pulses in Electron Quantum Optics
- Spectroscopy of hot-electron pair emission from a driven quantum dot
- Quantum transport phenomena induced by time-dependent fields
- Evidence of Coulomb liquid phase in few-electron droplets
- Modeling shallow confinement in tuneable quantum dots
- Advances toward high-accuracy gigahertz operation of tunable-barrier single-hole pumps in silicon
- Floquet-Nambu theory of electron quantum optics with superconductors
- Entanglement Generation and Stabilization by Coherent Collisions
- On-Demand and Tunable Andreev-Conversion of Single-Electron Charge Pulses
- Wigner representation of Andreev-reflected charge pulses
- Characterizing and Mitigating Timing Noise-Induced Decoherence in Single Electron Sources
- An ambipolar single-charge pump in silicon
- Coulomb collisions of hot and cold single electrons in series-coupled silicon single-electron pumps
- Negative currents in Fabry-Pérot cavities are caused by interfering paths
- Periodic source of energy-entangled electrons in helical states coupled to a BCS superconductor
- Eigenstate control of plasmon wavepackets with electron-channel blockade
- Hong-Ou-Mandel interference on a lattice: symmetries and interactions
- Scalable Parallel Single-Electron Pumps in Silicon with Split-Source Control in the Nanoampere Regime