Real time decoherence of Landau and Levitov quasi-particles in quantum Hall edge channels

Abstract

Quantum Hall edge channels at integer filling factor provide a unique test-bench to understand decoherence and relaxation of single electronic 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 $\nu =2$. 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.

14 pages, 8 figures

References in corpus (14)

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• Generation of energy selective excitations in quantum Hall edge states
• Electron and hole Hong-Ou-Mandel interferometry
• Quantum coherence engineering in the integer quantum Hall regime
• Time-resolved charge fractionalization in inhomogeneous Luttinger liquids
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Cited by in corpus (4)

• Hong-Ou-Mandel experiment for temporal investigation of single electron fractionalization
• Decoherence and relaxation of a single electron in a one dimensional conductor
• First-order correlation function of the stream of single-electron wave-packets
• Interference and multi-particle effects in a Mach-Zehnder interferometer with single-particle sources