Noise in quantum devices: A unified computational approach for different scattering mechanisms

Damiano Marian, Enrique Colomés

Research output: Contribution to journalArticleResearchpeer-review

2 Citations (Scopus)

Abstract

© 2016 World Scientific Publishing Company. When talking about noise in quantum devices two issues must be faced: how to model the evolution of an electronic system with scattering and how this noise is practically computed in a quantum device simulator. In the present paper, we address both problems from a practical and computational point of view. In particular, as the electronic quantum subsystem is an open (normally far from equilibrium) system, we use the notion of conditional wave function, the wave function of a subsystem in Bohmian mechanics, an alternative version of quantum mechanics which along with the wave function posited definite positions for the particles. This allows us to define an effective equation in several physical situations, ranging from the simple tunneling barrier to the interaction with a bath of phonons. Finally, we present how this development can be used to compute quantum noise in a quantum device simulator.
Original languageEnglish
Article number1640008
JournalFluctuation and Noise Letters
Volume15
Issue number3
DOIs
Publication statusPublished - 1 Sep 2016

Keywords

  • Bohmian mechanics
  • conditional wave function
  • electron-phonon interaction
  • quantum noise

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