Shaping charge excitations in chiral edge states with a time-dependent gate voltage

Abstract

We study a coherent conductor supporting a single edge channel in which alternating current pulses are created by local time-dependent gating and sent on a beam-splitter realized by a quantum point contact. The current response to the gate voltage in this setup is intrinsically linear. Based on a fully self-consistent treatment employing a Floquet scattering theory, we analyze the effect of different voltage shapes and frequencies, as well as the role of the gate geometry on the injected signal. In particular, we highlight the impact of frequency-dependent screening on the process of shaping the current signal. The feasibility of creating true single-particle excitations with this method is confirmed by investigating the suppression of excess noise, which is otherwise created by additional electron-hole pair excitations in the current signal.

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• Taming electronic decoherence in 1D chiral ballistic quantum conductors
• Topological characterization and stability of Floquet Majorana modes in Rashba nanowire
• Collisional interferometry of Levitons in quantum Hall edge channels at $\nu =2$
• Levitons in superconducting point contacts
• Minimal-excitation single-particle emitters: A comparison of charge and energy transport properties
• Hong-Ou-Mandel heat noise in the quantum Hall regime
• Levitons in helical liquids with Rashba spin-orbit coupling probed by a superconducting contact
• Processing quantum signals carried by electrical currents
• Probing charge and heat current noise by frequency-dependent temperature and potential fluctuations
• Composite two-particle sources
• Multi-particle interference in an electronic Mach-Zehnder interferometer
• High-temperature fusion of a multi-electron leviton
• Influence of channel mixing in fermionic Hong-Ou-Mandel experiments
• Quasiparticles states for integer- and fractional-charged electron wave packets
• Readout of quantum screening effects using a time-dependent probe
• Levitons in correlated nano-scale systems
• Quantum transport phenomena induced by time-dependent fields
• Auto- versus cross-correlation noise
• Single-electron emission from degenerate quantum levels