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Trapped Ion Quantum Computing Superconducting Qubits

Robust and Efficient High-dimensional Quantum State Tomography

arXiv

Authors: Markus Rambach, Mahdi Qaryan, Michael Kewming, Christopher Ferrie, Andrew G. White, Jacquiline Romero

Year

2020

Paper ID

20258

Status

Preprint

Abstract Read

~2 min

Abstract Words

105

Citations

N/A

Abstract

The exponential growth in Hilbert space with increasing size of a quantum system means that accurately characterising the system becomes significantly harder with system dimension d. We show that self-guided tomography is a practical, efficient, and robust technique of measuring higher-dimensional quantum states. The achieved fidelities are over 99.9% for qutrits d=3 and ququints d=5, and 99.1% for quvigints d=20, the highest values ever realised for qudits. We demonstrate robustness against experimental sources of noise, both statistical and environmental. The technique is applicable to any higher-dimensional system, from a collection of qubits through to individual qudits, and any physical realisation, be it photonic, superconducting, ionic, or spin.

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This paper contributes to the Superconducting Qubits research area in the Quantum Articles archive.
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The exponential growth in Hilbert space with increasing size of a quantum system means that accurately characterising the system becomes significantly harder with system...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2010.00632 [2] arXiv https://arxiv.org/abs/2010.00632 [3] Publisher https://arxiv.org/abs/2010.00632

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