Optimizing performance of quantum operations with non-Markovian decoherence: the tortoise or the hare?

Eoin P. Butler, Gerald E. Fux, Carlos Ortega-Taberner, Brendon W. Lovett, Jonathan Keeling, Paul R. Eastham

Research output: Contribution to journalArticlepeer-review

5 Downloads (Pure)

Abstract

The interaction between a quantum system and its environment limits our ability to control it and perform quantum operations on it. We present an efficient method to find optimal controls for quantum systems coupled to non-Markovian environments, by using the process tensor to compute the gradient of an objective function. We consider state transfer for a driven two-level system coupled to a bosonic environment, and characterize performance in terms of speed and fidelity. We thus determine the best achievable fidelity as a function of process duration. We show there is a trade-off between speed and fidelity, and that slower processes can have higher fidelity by exploiting non-Markovian effects.
Original languageEnglish
Article number060401
Number of pages7
JournalPhysical Review Letters
Volume132
Issue number6
Early online date8 Feb 2024
DOIs
Publication statusPublished - 9 Feb 2024

Fingerprint

Dive into the research topics of 'Optimizing performance of quantum operations with non-Markovian decoherence: the tortoise or the hare?'. Together they form a unique fingerprint.

Cite this