Quantum mechanics

Magnetic field

Spin (aerodynamics)

Quantum spin Hall effect

Backscatter (email)

Telecommunications

Computer science

Acoustics

Thermodynamics

Physics

Magnetoresistance

Image (mathematics)

Enhanced Data Rates for GSM Evolution

Condensed matter physics

Artificial intelligence

Quantum

Electromagnetic noise

Quantum Hall effect

Electron

Wireless

Noise (video)

Conductance

Physical Review Letters

Time-reversal symmetry suppresses electron backscattering in a quantum-spin-Hall edge, yielding quantized conductance at zero temperature. Understanding the dominant corrections in finite-temperature experiments remains an unsettled issue. We study a novel mechanism for conductance suppression: backscattering caused by incoherent electromagnetic noise. Specifically, we show that an electric potential fluctuating randomly in time can backscatter electrons inelastically without constraints faced by electron-electron interactions. We quantify noise-induced corrections to the dc conductance in various regimes and propose an experiment to test this scenario.Received 31 May 2018DOI:https://doi.org/10.1103/PhysRevLett.121.106601© 2018 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasElectrical conductivityFluctuations & noiseQuantum spin Hall effectPhysical SystemsTopological insulatorsCondensed Matter, Materials & Applied Physics

Noise-Induced Backscattering in a Quantum Spin Hall Edge