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Revisiting time-resolved Hong-Ou-Mandel interferometry for fractional excitations
by Aleksandr Latyshev, Imen Taktak, Ipsita Mandal, In\`es Safi
Submission summary
| Authors (as registered SciPost users): | Aleksandr Latyshev |
| Submission information | |
|---|---|
| Preprint Link: | scipost_202512_00034v2 (pdf) |
| Date submitted: | Dec. 15, 2025, 11:59 a.m. |
| Submitted by: | Aleksandr Latyshev |
| Submitted to: | SciPost Physics |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approaches: | Theoretical, Computational |
Abstract
We develop a general framework for time-resolved Hong–Ou–Mandel (HOM) interferometry in the fractional quantum Hall effect (FQHE), revisiting approaches that considered only noise associated with quasiparticle tunneling. We derive a universal perturbative relation linking cross-correlations of chiral currents under arbitrary AC drives to their DC counterparts. Motivated by a recent experiments, we consider an injection protocol for pulses carrying charge $q$, as suggested by the plasmon-scattering approach, and show that the resulting HOM signal is entirely insensitive to any non-integer $q$, irrespective of the underlying edge Hamiltonian. Specializing the latter to a chiral Tomonaga–Luttinger liquid, we analyze the width of the HOM dip for both sharp and finite-duration pulses. We find that the dip width exhibits a nontrivial dependence on the scaling dimension $\delta$, in stark contrast with the simple $1/\delta$ scaling.
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