Universal Fidelity Reduction of Quantum Operations from Weak Dissipation
Artikel i vetenskaplig tidskrift, 2022

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.

Författare

Tahereh Abad

Chalmers, Mikroteknologi och nanovetenskap, Tillämpad kvantfysik

Jorge Fernández-Pendás

Chalmers, Mikroteknologi och nanovetenskap, Tillämpad kvantfysik

Anton Frisk Kockum

Chalmers, Mikroteknologi och nanovetenskap, Tillämpad kvantfysik

Göran Johansson

Chalmers, Mikroteknologi och nanovetenskap, Tillämpad kvantfysik

Physical Review Letters

0031-9007 (ISSN) 1079-7114 (eISSN)

Vol. 129 15 150504

Ämneskategorier

Övrig annan teknik

Annan fysik

Datavetenskap (datalogi)

DOI

10.1103/PhysRevLett.129.150504

PubMed

36269966

Mer information

Senast uppdaterat

2023-10-26