Abstract：
:Quantum Hall edge channels offer an efficient and controllable platform to study quantum transport in one dimension. Such channels are a prospective tool for the efficient transfer of quantum information at the nanoscale, and play a vital role in exposing intriguing physics. Electric current along the edge carries energy and heat leading to inelastic scattering, which may impede coherent transport. Several experiments attempting to probe the concomitant energy redistribution along the edge reported energy loss via unknown mechanisms of inelastic scattering. Here we employ quantum dots to inject and extract electrons at specific energies, to spectrally analyse inelastic scattering inside quantum Hall edge channels. We show that the missing energy puzzle could be untangled by incorporating non-local Auger-like processes, in which energy is redistributed between spatially separate parts of the sample. Our theoretical analysis, accounting for the experimental results, challenges common-wisdom analyses which ignore such non-local decay channels.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Krähenmann T,Fischer SG,Röösli M,Ihn T,Reichl C,Wegscheider W,Ensslin K,Gefen Y,Meir Ydoi
10.1038/s41467-019-11888-1subject
Has Abstractpub_date
2019-09-02 00:00:00pages
3915issue
1issn
2041-1723pii
10.1038/s41467-019-11888-1journal_volume
10pub_type
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