Trapped-ion quantum logic with global radiation fields

Weidt, S, Randall, J, Webster, S C, Lake, K, Webb, A E, Cohen, I, Navickas, T, Lekitsch, B, Retzker, A and Hensinger, W K (2016) Trapped-ion quantum logic with global radiation fields. Physical Review Letters, 117 (22). 0501. ISSN 0031-9007

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Abstract

Trapped ions are a promising tool for building a large-scale quantum computer. However, the number of required radiation fields for the realization of quantum gates in any proposed ion-based architecture scales with the number of ions within the quantum computer, posing a major obstacle when imagining a device with millions of ions. Here, we present a fundamentally different approach for trapped-ion quantum computing where this detrimental scaling vanishes. The method is based on individually controlled voltages applied to each logic gate location to facilitate the actual gate operation analogous to a traditional transistor architecture within a classical computer processor. To demonstrate the key principle of this approach we implement a versatile quantum gate method based on long-wavelength radiation and use this method to generate a maximally entangled state of two quantum engineered clock qubits with fidelity 0.985(12). This quantum gate also constitutes a simple-to-implement tool for quantum metrology, sensing, and simulation.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups: Astronomy Centre
Subjects: Q Science > QC Physics
Depositing User: Richard Chambers
Date Deposited: 06 Dec 2016 09:28
Last Modified: 06 Mar 2017 16:17
URI: http://sro.sussex.ac.uk/id/eprint/65811

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Project NameSussex Project NumberFunderFunder Ref
Quantum technology with nanofabricated ion trap chipsG0308EPSRC-ENGINEERING & PHYSICAL SCIENCES RESEARCH COUNCILEP/G007276/1
UK Quantum Technology Hub: NQIT-Networked Quantum Information TechnologiesG1503EPSRC-ENGINEERING & PHYSICAL SCIENCES RESEARCH COUNCILEP/M013243/1
UK Quantum Technology Hub for Sensors and MetrologyG1511EPSRC-ENGINEERING & PHYSICAL SCIENCES RESEARCH COUNCILEP/M013294/1
Integrated Quantum Information TechnologyG0650EUROPEAN UNIONGA 270843
UnsetUnsetUS ArmyW911NF-14-2-0106
UnsetUnsetUS ArmyW911NF-12-2-0072