Universal Fidelity Reduction of Quantum Operations from Weak Dissipation

Tahereh Abad*, Jorge Fernández-Pendás, Anton Frisk Kockum, Göran Johansson*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Quantum information processing is in real systems often limited by dissipation, stemming from remaining uncontrolled interaction with microscopic degrees of freedom. Given recent experimental progress, we consider weak dissipation, resulting in a small error probability per operation. Here, we find a simple formula for the fidelity reduction of any desired quantum operation, where the ideal evolution is confined to the computational subspace. Interestingly, this reduction is independent of the specific operation; it depends only on the operation time and the dissipation. Using our formula, we investigate the situation where dissipation in different parts of the system has correlations, which is detrimental for the successful application of quantum error correction. Surprisingly, we find that a large class of correlations gives the same fidelity reduction as uncorrelated dissipation of similar strength.

Original languageEnglish
Article number150504
JournalPhysical Review Letters
Issue number15
StatePublished - 7 Oct 2022
Externally publishedYes


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