Enhanced estimation of quantum properties with common randomized measurements - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue PRX Quantum Année : 2024

Enhanced estimation of quantum properties with common randomized measurements

Résumé

We present a technique for enhancing the estimation of quantum state properties by incorporating approximate prior knowledge about the quantum state of interest. This method involves performing randomized measurements on a quantum processor and comparing the results with those obtained from a classical computer that stores an approximation of the quantum state. We provide unbiased estimators for expectation values of multi-copy observables and present performance guarantees in terms of variance bounds which depend on the prior knowledge accuracy. We demonstrate the effectiveness of our approach through numerical experiments estimating polynomial approximations of the von Neumann entropy and quantum state fidelities.

Dates et versions

hal-04096365 , version 1 (12-05-2023)

Identifiants

Citer

Benoît Vermersch, Aniket Rath, Bharathan Sundar, Cyril Branciard, John Preskill, et al.. Enhanced estimation of quantum properties with common randomized measurements. PRX Quantum, 2024, 5 (1), pp.010352. ⟨10.1103/PRXQuantum.5.010352⟩. ⟨hal-04096365⟩
40 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More