Effects of disorder and interactions in environment assisted quantum transport

Elinor Zerah-Harush, Yonatan Dubi

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

Understanding the interplay between disorder, environment, and interactions is key to elucidating the transport properties of open quantum systems, from excitons in photosynthetic networks to qubits in ion traps. This interplay is studied here theoretically in the context of environment-assisted quantum transport (ENAQT), a unique situation in open system where an environment-induced dephasing can, counterintuitively, enhance transport. First, we show a surprising situation where the particle current grows with increasing disorder, even without dephasing. Then, we suggest a specific mechanism for ENAQT (which we dub population uniformization) and demonstrate that it can explain the persistence of ENAQT deep into the disorder-induced localization regime. Finally, we show that repulsive interactions are detrimental to ENAQT, and lead to an environment-hampered quantum transport. Our predictions can readily be tested within the scope of current experimental capabilities.

Original languageEnglish
Article number023294
JournalPhysical Review Research
Volume2
Issue number2
DOIs
StatePublished - 5 Jun 2020

ASJC Scopus subject areas

  • General Physics and Astronomy

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