Resilient entangling gates for trapped ions

Webb, A E, Webster, S C, Collingbourne, S, Bretaud, D, Lawrence, A M, Weidt, S, Mintert, F and Hensinger, W K (2018) Resilient entangling gates for trapped ions. Physical Review Letters, 121 (18). 180501 1-6. ISSN 0031-9007

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Constructing a large-scale ion trap quantum processor will require entangling gate operations that are robust in the presence of noise and experimental imperfection. We experimentally demonstrate how a new type of Mølmer-Sørensen gate protects against infidelity caused by heating of the motional mode used during the gate. Furthermore, we show how the same technique simultaneously provides significant protection against slow fluctuations and mis-sets in the secular frequency. Since this parameter sensitivity is worsened in cases where the ions are not ground-state cooled, our method provides a path towards relaxing ion cooling requirements in practical realizations of quantum computing and simulation.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups: Atomic, Molecular and Optical Physics Research Group
Subjects: Q Science > QC Physics
Depositing User: Alice Jackson
Date Deposited: 07 Nov 2018 16:05
Last Modified: 07 Nov 2018 16:05

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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