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  • Open Access

Implementation of a Frenkel exciton-based controlled phase shifter

Bernard Yurke1,*, Richard Elliott1, and Aaron Sup2

  • 1Micron School of Materials Science and Engineering, Boise State University, Boise, Idaho 83725-1320, USA
  • 2Department of Physics, Boise State University, Boise, Idaho 83725-1320, USA

  • *Also at Department of Electrical and Computer Engineering, Boise State University, Boise, ID 83725-1320, USA.

Phys. Rev. A 107, 012603 – Published 4 January, 2023

DOI: https://doi.org/10.1103/PhysRevA.107.012603

Abstract

Frenkel excitons are of interest for ultrafast switching applications due to the femtosecond timescale at which coherent exciton transfer between chromophores takes place. The Frenkel Hamiltonian, which governs the dynamics of Frenkel excitons, belongs to a class of Hamiltonians that enable universal quantum computation. It is thus of interest to determine how a complete set of exciton-based gates for quantum computing could be constructed as aggregates of chromophores. We demonstrate that a controlled phase shifter can be constructed as a pair of exciton transmission lines that employ two types of chromophores and that are cross coupled by a two-exciton interaction. This element facilitates the construction of controlled basis-change gates, thereby enabling the implementation of a complete set of exciton-based gates for universal quantum computation.

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