Pure dephasing increases partition noise in the quantum Hall effect
Abstract
Quantum Hall edge channels partition electric charge over N chiral (uni-directional) modes. Intermode scattering leads to partition noise, observed in graphene p-n junctions. While inelastic scattering suppresses this noise by averaging out fluctuations, we show that pure (quasi-elastic) dephasing may enhance the partition noise. The noise power increases by up to 50% for two modes, with a general enhancement factor of 1+1/N in the strong-dephasing limit. This counterintuitive effect is explained in the framework of monitored quantum transport, arising from the self-averaging of quantum trajectories.
Fields of Study & Subjects
Quantum and electron transport phenomena
Advancements in Semiconductor Devices and Circuit Design
Quantum Computing Algorithms and Architecture
Publication details
- Journal / source
- Physical review. B./Physical review. B
- Publisher
- American Physical Society (APS)
- Volume
- 113
- Issue
- 7
- Publication date
- 27 January 2026
- Language
- EN