Universally robust quantum control

Poggi, Pablo and De Chiara, Gabriele and Campbell, Steve and Kiely, Anthony (2024) Universally robust quantum control. Physical Review Letters, 132 (19). 193801. ISSN 1079-7114 (https://doi.org/10.1103/PhysRevLett.132.193801)

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Abstract

We study the robustness of the evolution of a quantum system against small uncontrolled variations in parameters in the Hamiltonian. We show that the fidelity susceptibility, which quantifies the perturbative error to leading order, can be expressed in superoperator form and use this to derive control pulses that are robust to any class of systematic unknown errors. The proposed optimal control protocol is equivalent to searching for a sequence of unitaries that mimics the first-order moments of the Haar distribution, i.e., it constitutes a 1-design. We highlight the power of our results for error-resistant single- and two-qubit gates.

ORCID iDs

Poggi, Pablo ORCID logoORCID: https://orcid.org/0000-0002-9035-3090, De Chiara, Gabriele, Campbell, Steve and Kiely, Anthony;
  • Item type:Article
    ID code:89153
    Dates:
    Date
    Event
    7 May 2024
    Published
    16 April 2024
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:08 May 2024 09:35
    Last modified:11 Nov 2024 14:18
    URI:https://strathprints.strath.ac.uk/id/eprint/89153
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