Electric-field assisted optimal quantum transport of photo-excitations in polar heterostructures

Claudio Giannetti, Fausto Borgonovi, Giuseppe Luca Celardo

Risultato della ricerca: Contributo in rivistaArticolo in rivistapeer review

2 Citazioni (Scopus)

Abstract

Transition-metal-oxide (TMO) heterostructures are promising candidates for building photon-harvesting devices which can exploit optimal quantum transport of charge excitations generated by light absorption. Here we address the explicit role of an electric field on the quantum transport properties of photo-excitations subject to dephasing in one-dimensional chains coupled to a continuum of states acting as a sink. We show that the average transfer time to the sink is optimized for suitable values of both the coupling strength to the sink and the electric field, thus fully exploiting the coherence-enhanced efficiency in the quantum transport regime achievable in few monolayers TMO heterostructures. The optimal coupling to the continuum remains approximately the same as that in absence of electric field and is characterizing the Superradiant Transition. On the other hand, the optimal electric field for which we provide estimates using an analytical expression is dependent on the initial state.
Lingua originaleEnglish
pagine (da-a)114023-114033
Numero di pagine11
RivistaPHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
Volume120
DOI
Stato di pubblicazionePubblicato - 2020

Keywords

  • Electric potential
  • Open quantum systems
  • Optimal quantum transport
  • Quantum master equation
  • Superradiance
  • Transition-metal-oxide heterostructures

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