Spectroscopy of hot-electron pair emission from a driven quantum dot
arXiv:2303.15436 · doi:10.1103/PhysRevB.109.115433
Abstract
On-demand emission of individual electrons for the implementation of flying qubits and quantum electron-optics experiments requires precise knowledge and tunability of emission times and energies. Crucially, for confined electron sources such as driven quantum dots, the effect of local Coulomb interaction on these emission properties needs to be understood, in particular if multiple particles are emitted close in time or near-simultaneously. This paper theoretically analyzes electron-pair emission from an ac driven quantum dot, detailing the competing effects of the electron-electron interaction, the time-dependent potential forming the quantum dot, and of the quantum-state properties such as degeneracy on the emission times and energies. We complement a numerical analysis of the coherent Schrödinger evolution of two particles in a driven potential with a master-equation description for strongly interacting electrons tunneling stochastically into a weakly coupled conductor. This captures a broad range of different influences on the emitted particles and thereby guides the development of single-electron sources higher control over two-particle emission properties.
11 pages plus appendix
References in corpus (16)
- The Kernel Polynomial Method
- An On-Demand Coherent Single Electron Source
- Coherence and Indistinguishability of Single Electrons Emitted by Independent Sources
- Hong-Ou-Mandel experiment for temporal investigation of single electron fractionalization
- Partitioning of on-demand electron pairs
- Counting statistics for electron capture in a dynamic quantum dot
- Generation of energy selective excitations in quantum Hall edge states
- Measuring the degeneracy of discrete energy levels using a GaAs/AlGaAs quantum dot
- Quantum fluctuations and coherence in high-precision single-electron capture
- Coulomb-mediated antibunching of an electron pair surfing on sound
- Two electrons interacting at a mesoscopic beam splitter
- Relaxation of quantum dots in a magnetic field at finite bias -- charge, spin and heat currents
- Coulomb-blockade effect in nonlinear mesoscopic capacitors
- Partition of Two Interacting Electrons by a Potential Barrier
- Detecting Majorana modes by readout of poisoning-induced parity flips
- Quantum dot state initialization by control of tunneling rates