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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.

SUBMITTER: Zhang K

PROVIDER: S-EPMC6795904 | biostudies-other | 2019 Oct

REPOSITORIES: biostudies-other

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Modular quantum computation in a trapped ion system.

Zhang Kuan K Thompson Jayne J Zhang Xiang X Shen Yangchao Y Lu Yao Y Zhang Shuaining S Ma Jiajun J Vedral Vlatko V Gu Mile M Kim Kihwan K

Nature communications 20191016 1

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 alg ...[more]

PMID: 31619670

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