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Quantum Flicker Noise in Atomic and Molecular Junctions

Ofir Shein-Lumbroso, Junjie Liu, Abhay Shastry, Dvira Segal, and Oren Tal
Phys. Rev. Lett. 128, 237701 – Published 9 June 2022
Physics logo See synopsis: Pink Noise as a Probe of Quantum Transport
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Abstract

We report on a quantum form of electronic flicker noise in nanoscale conductors that contains valuable information on quantum transport. This noise is experimentally identified in atomic and molecular junctions and theoretically analyzed by considering quantum interference due to fluctuating scatterers. Using conductance, shot-noise, and flicker-noise measurements, we show that the revealed quantum flicker noise uniquely depends on the distribution of transmission channels, a key characteristic of quantum conductors. This dependence opens the door for the application of flicker noise as a diagnostic probe for fundamental properties of quantum conductors and many-body quantum effects, a role that up to now has been performed by the experimentally less-accessible shot noise.

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  • Received 25 July 2021
  • Accepted 2 May 2022

DOI:https://doi.org/10.1103/PhysRevLett.128.237701

© 2022 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied PhysicsQuantum Information, Science & TechnologyStatistical Physics & Thermodynamics

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Pink Noise as a Probe of Quantum Transport

Published 9 June 2022

Measurements of so-called flicker noise can shed light on quantum effects that govern charge transport in nanoscale conductors.

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Authors & Affiliations

Ofir Shein-Lumbroso1, Junjie Liu2,*, Abhay Shastry2,*, Dvira Segal2,3,†, and Oren Tal1,‡

  • 1Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot 7610001, Israel
  • 2Department of Chemistry and Centre for Quantum Information and Quantum Control, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada
  • 3Department of Physics, 60 Saint George Street, University of Toronto, Toronto, Ontario M5S 1A7, Canada

  • *These authors contributed equally to this work.
  • dvira.segal@utoronto.ca
  • oren.tal@weizmann.ac.il

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Issue

Vol. 128, Iss. 23 — 10 June 2022

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