Real-Time Decoherence of Landau and Levitov Quasiparticles in Quantum Hall Edge Channels

2014/03/31 by D. Ferraro, Dario Ferraro, B. Roussel +11 · 6 citations
Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Charge (physics) #Condensed matter physics #Electron #Excitation #Filling factor #Fractional quantum Hall effect #Landau quantization #Molecular Junctions and Nanostructures #Physics #Quantum #Quantum Hall effect #Quantum and electron transport phenomena #Quantum decoherence #Quantum mechanics #Quantum point contact #Quantum spin Hall effect #Quantum well #Quasiparticle #Relaxation (psychology) #Spin (aerodynamics) #Superconductivity #cond-mat.mes-hall #quant-ph

paper · pdf · doi:10.1103/physrevlett.113.166403

published as Phys. Rev. Lett. 113, 166403 (2014) · 14 pages, 8 figures

arxiv created 2014/03/31 · openalex publication_date 2014/10/16 · arxiv updated 2015/03/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Quantum Hall edge channels at integer filling factor provide a unique test bench to understand the decoherence and relaxation of single-electron excitations in a ballistic quantum conductor. In this Letter, we obtain a full visualization of the decoherence scenario of energy (Landau)- and time (Levitov)-resolved single-electron excitations at filling factor ν = 2. We show that the Landau excitation exhibits a fast relaxation followed by spin-charge separation whereas the Levitov excitation only experiences spin-charge separation. We finally suggest to use Hong-Ou-Mandel-type experiments to probe specific signatures of these different scenarios.

Citations

• Electron counting statistics and coherent states of electric current
• A dynamic scattering approach for a gated interacting wire
• An electronic Mach–Zehnder interferometer
• Shot Noise of a Mesoscopic Two-Particle Collider
• Finite bias visibility of the electronic Mach-Zehnder interferometer
• Tuning Energy Relaxation along Quantum Hall Channels
• Coherence of single-electron sources from Mach-Zehnder interferometry
• Reconstruction of non-classical cavity field states with snapshots of their decoherence

Cited by

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• Suppression of the radiation squeezing in interacting quantum Hall edge channels
• Coulomb and exchange interaction effects on the exact two-electron dynamics in the Hong-Ou-Mandel interferometer based on Hall edge states
• Electron interferometry in integer quantum Hall edge channels