Efficient Exploration of Hamiltonian Parameter Space for Optimal Control of Non-Markovian Open Quantum Systems

Gerald E. Fux, Eoin P. Butler, Paul R. Eastham, Brendon W. Lovett, and Jonathan Keeling
Phys. Rev. Lett. 126, 200401 – Published 17 May 2021

Abstract

We present a general method to efficiently design optimal control sequences for non-Markovian open quantum systems, and illustrate it by optimizing the shape of a laser pulse to prepare a quantum dot in a specific state. The optimization of control procedures for quantum systems with strong coupling to structured environments—where time-local descriptions fail—is a computationally challenging task. We modify the numerically exact time evolving matrix product operator (TEMPO) method, such that it allows the repeated computation of the time evolution of the reduced system density matrix for various sets of control parameters at very low computational cost. This method is potentially useful for studying numerous optimal control problems, in particular in solid state quantum devices where the coupling to vibrational modes is typically strong.

  • Figure
  • Figure
  • Figure
  • Received 8 January 2021
  • Accepted 14 April 2021

DOI:https://doi.org/10.1103/PhysRevLett.126.200401

© 2021 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & TechnologyAtomic, Molecular & OpticalGeneral PhysicsCondensed Matter, Materials & Applied Physics

Authors & Affiliations

Gerald E. Fux1, Eoin P. Butler2, Paul R. Eastham2, Brendon W. Lovett1, and Jonathan Keeling1

  • 1SUPA, School of Physics and Astronomy, University of St Andrews, St Andrews KY16 9SS, United Kingdom
  • 2School of Physics, Trinity College Dublin, College Green, Dublin 2, Ireland

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 126, Iss. 20 — 21 May 2021

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×