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Modular quantum computation in a trapped ion system.

Abstract：

:Modern computation relies crucially on modular architectures, breaking a complex algorithm into self-contained subroutines. A client can then call upon a remote server to implement parts of the computation independently via an application programming interface (API). Present APIs relay only classical information. Here we implement a quantum API that enables a client to estimate the absolute value of the trace of a server-provided unitary operation [Formula: see text]. We demonstrate that the algorithm functions correctly irrespective of what unitary [Formula: see text] the server implements or how the server specifically realizes [Formula: see text]. Our experiment involves pioneering techniques to coherently swap qubits encoded within the motional states of a trapped [Formula: see text] ion, controlled on its hyperfine state. This constitutes the first demonstration of modular computation in the quantum regime, providing a step towards scalable, parallelization of quantum computation.

journal_name

Nat Commun

journal_title

Nature communications

authors

Zhang K,Thompson J,Zhang X,Shen Y,Lu Y,Zhang S,Ma J,Vedral V,Gu M,Kim K

doi

10.1038/s41467-019-12643-2

subject

Has Abstract

pub_date

2019-10-16 00:00:00

pages

4692

issue

1

issn

2041-1723

pii

10.1038/s41467-019-12643-2

journal_volume

10

pub_type

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