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Niels Jakob Søe Loft

Realization of efficient quantum gates with a superconducting qubit-qutrit circuit

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Building a quantum computer is a daunting challenge since it requires good control but also good isolation from the environment to minimize decoherence. It is therefore important to realize quantum gates efficiently, using as few operations as possible, to reduce the amount of required control and operation time and thus improve the quantum state coherence. Here we propose a superconducting circuit for implementing a tunable system consisting of a qutrit coupled to two qubits. This system can efficiently accomplish various quantum information tasks, including generation of entanglement of the two qubits and conditional three-qubit quantum gates, such as the Toffoli and Fredkin gates. Furthermore, the system realizes a conditional geometric gate which may be used for holonomic (nonadiabatic) quantum computing. The efficiency, robustness and universality of the presented circuit makes it a promising candidate to serve as a building block for larger networks capable of performing involved quantum computational tasks.

Original languageEnglish
Article number13389
JournalScientific Reports
Volume9
Pages (from-to)1-10
Number of pages10
ISSN2045-2322
DOIs
Publication statusPublished - Sep 2019

    Research areas

  • IMPLEMENTATION, ALGORITHMS

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