Efficient quantum algorithm for computing n-time correlation functions

J.S. Pedernales, R. Di Candia, I.L. Egusquiza, J. Casanova, Enrique Solano

Research output: Contribution to journalArticleScientificpeer-review

45 Citations (Scopus)

Abstract

We propose a method for computing n-time correlation functions of arbitrary spinorial, fermionic, and bosonic operators, consisting of an efficient quantum algorithm that encodes these correlations in an initially added ancillary qubit for probe and control tasks. For spinorial and fermionic systems, the reconstruction of arbitrary n-time correlation functions requires the measurement of two ancilla observables, while for bosonic variables time derivatives of the same observables are needed. Finally, we provide examples applicable to different quantum platforms in the frame of the linear response theory.
Original languageEnglish
Number of pages5
JournalPhysical Review Letters
Volume113
Issue number2
DOIs
Publication statusPublished - 2014
MoE publication typeA1 Journal article-refereed

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