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<p>Greenberger–Horne–Zeilinger states on two to eight qubits in a chain of ten <sup>171</sup>Yb<sup>+</sup> ions in a linear Paul trap has been prepared by executing a sequence of one- and two-qubit operations on the corresponding ions. The obtained states have been analyzed and their fidelity for the Greenberger–Horne–Zeilinger state on eight qubits has been estimated at (58.9 ± 0.6)%. The expected increase in the sensitivity of parity oscillations as a function of the phase of the probe laser pulse has also been demonstrated. This result is an important step towards the creation of a multiparticle ytterbium ion optical clock with frequency averaging according to the law 1/<i>N</i> in contrast to the slower law <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11448_2025_4232_Article_IEq1.gif" Format="GIF" Height="21" Rendition="HTML" Resolution="72" Type="Linedraw" Width="48" /> </InlineMediaObject> <EquationSource Format="TEX">\(1{\text{/}}\sqrt N \)</EquationSource> <!--JETPLet2560630Korolkov-m1--> </InlineEquation> for an ensemble of independent particles in the case where decoherence is dominated by spontaneous decay.</p>

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Preparation of Multiparticle Greenberger–Horne–Zeilinger States on 171Yb+ Ions for Frequency Standards

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年5月1日

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  • A. E. Korolkov,
  • I. V. Zalivako,
  • A. S. Borisenko,
  • V. N. Smirnov,
  • P. A. Kamenskikh,
  • I. A. Semerikov,
  • K. Yu. Khabarova,
  • N. N. Kolachevsky

摘要

Greenberger–Horne–Zeilinger states on two to eight qubits in a chain of ten 171Yb+ ions in a linear Paul trap has been prepared by executing a sequence of one- and two-qubit operations on the corresponding ions. The obtained states have been analyzed and their fidelity for the Greenberger–Horne–Zeilinger state on eight qubits has been estimated at (58.9 ± 0.6)%. The expected increase in the sensitivity of parity oscillations as a function of the phase of the probe laser pulse has also been demonstrated. This result is an important step towards the creation of a multiparticle ytterbium ion optical clock with frequency averaging according to the law 1/N in contrast to the slower law \(1{\text{/}}\sqrt N \) for an ensemble of independent particles in the case where decoherence is dominated by spontaneous decay.