Quantum noise detects Floquet topological phases

Quantum noise detects Floquet topological phases

We study quantum noise in a nonequilibrium, periodically driven, open system attached to static leads. Using a Floquet Green's function formalism we show, both analytically and numerically, that local voltage noise spectra can detect the rich structure of Floquet topological phases unambiguousl...

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Veröffentlicht in:arXiv.org 2018-07
Hauptverfasser: Rodriguez-Vega, M, Fertig, H A, Seradjeh, B
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Sprache:eng
Schlagworte:
Green's functions
Noise
Noise sensitivity
Noise spectra
Open systems
Phases
Physics - Disordered Systems and Neural Networks
Physics - Mesoscale and Nanoscale Physics
Robustness (mathematics)
Topology
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Fertig, H A
Seradjeh, B
description We study quantum noise in a nonequilibrium, periodically driven, open system attached to static leads. Using a Floquet Green's function formalism we show, both analytically and numerically, that local voltage noise spectra can detect the rich structure of Floquet topological phases unambiguously. Remarkably, both regular and anomalous Floquet topological bound states can be detected, and distinguished, via peak structures of noise spectra at the edge around zero-, half-, and full-drive-frequency. We also show that the topological features of local noise are robust against moderate disorder. Thus, local noise measurements are sensitive detectors of Floquet topological phases.
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subjects Green's functions
Noise
Noise sensitivity
Noise spectra
Open systems
Phases
Physics - Disordered Systems and Neural Networks
Physics - Mesoscale and Nanoscale Physics
Robustness (mathematics)
Topology
title Quantum noise detects Floquet topological phases
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