<p>Realizing universal fault-tolerant quantum computation is a key goal in quantum information science<sup><CitationRef AdditionalCitationIDS="CR2 CR3" CitationID="CR1">1</CitationRef>–<CitationRef CitationID="CR4">4</CitationRef></sup>. By encoding quantum information into logical qubits using quantum error correcting codes, physical errors can be detected and corrected, enabling a substantial reduction in logical error rates<sup><CitationRef AdditionalCitationIDS="CR6 CR7 CR8 CR9 CR10" CitationID="CR5">5</CitationRef>–<CitationRef CitationID="CR11">11</CitationRef></sup>. However, the set of logical operations that can be easily implemented on these encoded qubits is often constrained<sup><CitationRef CitationID="CR1">1</CitationRef>,<CitationRef CitationID="CR12">12</CitationRef></sup>, necessitating the use of special resource states known as ‘magic states’<sup><CitationRef CitationID="CR13">13</CitationRef></sup> to implement universal, classically hard circuits<sup><CitationRef CitationID="CR14">14</CitationRef></sup>. A key method to prepare high-fidelity magic states is to perform ‘distillation’, creating them from multiple lower-fidelity inputs<sup><CitationRef CitationID="CR13">13</CitationRef>,<CitationRef CitationID="CR15">15</CitationRef></sup>. Here we present the experimental realization of magic state distillation with logical qubits on a neutral-atom quantum computer. Our approach uses a dynamically reconfigurable architecture<sup><CitationRef CitationID="CR8">8</CitationRef>,<CitationRef CitationID="CR16">16</CitationRef></sup> to encode and perform quantum operations on many logical qubits in parallel. We demonstrate the distillation of magic states encoded in <i>d</i> = 3 and <i>d</i> = 5 colour codes, observing improvements in the logical fidelity of the output magic states compared with the input logical magic states. These experiments demonstrate a key building block of universal fault-tolerant quantum computation and represent an important step towards large-scale logical quantum processors.</p>

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Experimental demonstration of logical magic state distillation

  • Pedro Sales Rodriguez,
  • John M. Robinson,
  • Paul Niklas Jepsen,
  • Zhiyang He,
  • Casey Duckering,
  • Chen Zhao,
  • Kai-Hsin Wu,
  • Joseph Campo,
  • Kevin Bagnall,
  • Minho Kwon,
  • Thomas Karolyshyn,
  • Phillip Weinberg,
  • Madelyn Cain,
  • Simon J. Evered,
  • Alexandra A. Geim,
  • Marcin Kalinowski,
  • Sophie H. Li,
  • Tom Manovitz,
  • Jesse Amato-Grill,
  • James I. Basham,
  • Liane Bernstein,
  • Boris Braverman,
  • Alexei Bylinskii,
  • Adam Choukri,
  • Robert J. DeAngelo,
  • Fang Fang,
  • Connor Fieweger,
  • Paige Frederick,
  • David Haines,
  • Majd Hamdan,
  • Julian Hammett,
  • Ning Hsu,
  • Ming-Guang Hu,
  • Florian Huber,
  • Ningyuan Jia,
  • Dhruv Kedar,
  • Milan Kornjača,
  • Fangli Liu,
  • John Long,
  • Jonathan Lopatin,
  • Pedro L. S. Lopes,
  • Xiu-Zhe Luo,
  • Tommaso Macrì,
  • Ognjen Marković,
  • Luis A. Martínez-Martínez,
  • Xianmei Meng,
  • Stefan Ostermann,
  • Evgeny Ostroumov,
  • David Paquette,
  • Zexuan Qiang,
  • Vadim Shofman,
  • Anshuman Singh,
  • Manuj Singh,
  • Nandan Sinha,
  • Henry Thoreen,
  • Noel Wan,
  • Yiping Wang,
  • Daniel Waxman-Lenz,
  • Tak Wong,
  • Jonathan Wurtz,
  • Andrii Zhdanov,
  • Laurent Zheng,
  • Markus Greiner,
  • Alexander Keesling,
  • Nathan Gemelke,
  • Vladan Vuletić,
  • Takuya Kitagawa,
  • Sheng-Tao Wang,
  • Dolev Bluvstein,
  • Mikhail D. Lukin,
  • Alexander Lukin,
  • Hengyun Zhou,
  • Sergio H. Cantú

摘要

Realizing universal fault-tolerant quantum computation is a key goal in quantum information science14. By encoding quantum information into logical qubits using quantum error correcting codes, physical errors can be detected and corrected, enabling a substantial reduction in logical error rates511. However, the set of logical operations that can be easily implemented on these encoded qubits is often constrained1,12, necessitating the use of special resource states known as ‘magic states’13 to implement universal, classically hard circuits14. A key method to prepare high-fidelity magic states is to perform ‘distillation’, creating them from multiple lower-fidelity inputs13,15. Here we present the experimental realization of magic state distillation with logical qubits on a neutral-atom quantum computer. Our approach uses a dynamically reconfigurable architecture8,16 to encode and perform quantum operations on many logical qubits in parallel. We demonstrate the distillation of magic states encoded in d = 3 and d = 5 colour codes, observing improvements in the logical fidelity of the output magic states compared with the input logical magic states. These experiments demonstrate a key building block of universal fault-tolerant quantum computation and represent an important step towards large-scale logical quantum processors.