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Sci Adv. 2017 Feb 1;3(2):e1601540. doi: 10.1126/sciadv.1601540. eCollection 2017 Feb.

Blueprint for a microwave trapped ion quantum computer.

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Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QH, U.K.
Google Inc., Santa Barbara, CA 93117, USA.
Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark.
Center for Emergent Matter Science, RIKEN, Wako-shi, Saitama 315-0198, Japan.
Department Physik, Naturwissenschaftlich-Technische Fakultät, Universität Siegen, 57068 Siegen, Germany.


The availability of a universal quantum computer may have a fundamental impact on a vast number of research fields and on society as a whole. An increasingly large scientific and industrial community is working toward the realization of such a device. An arbitrarily large quantum computer may best be constructed using a modular approach. We present a blueprint for a trapped ion-based scalable quantum computer module, making it possible to create a scalable quantum computer architecture based on long-wavelength radiation quantum gates. The modules control all operations as stand-alone units, are constructed using silicon microfabrication techniques, and are within reach of current technology. To perform the required quantum computations, the modules make use of long-wavelength radiation-based quantum gate technology. To scale this microwave quantum computer architecture to a large size, we present a fully scalable design that makes use of ion transport between different modules, thereby allowing arbitrarily many modules to be connected to construct a large-scale device. A high error-threshold surface error correction code can be implemented in the proposed architecture to execute fault-tolerant operations. With appropriate adjustments, the proposed modules are also suitable for alternative trapped ion quantum computer architectures, such as schemes using photonic interconnects.


Quantum Information Processing; Quantum computing; ion trapping; quantum technology; surface error correction

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