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Alexander Erhard1, Hendrik Poulsen Nautrup2, Michael Meth1

  • 1Institute for Experimental Physics, University of Innsbruck, Innsbruck, Austria.

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|January 14, 2021

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This summary is machine-generated.

Researchers demonstrated lattice surgery, a key technique for quantum error correction, between two logical qubits. This advance in fault-tolerant quantum computing enables essential operations like entanglement and teleportation.

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Area of Science:

  • Quantum Information Science
  • Quantum Computing Architectures
  • Fault-Tolerant Quantum Computation

Background:

  • Quantum computing development relies on fault tolerance via quantum error correction.
  • Fault-tolerant logical operations require significant overhead on logical qubits.
  • Lattice surgery offers a resource-efficient method for implementing logical operations.

Purpose of the Study:

  • To experimentally realize lattice surgery between topologically protected logical qubits.
  • To demonstrate fundamental operations for fault-tolerant quantum computation.

Main Methods:

  • Utilized a ten-qubit ion-trap quantum information processor.
  • Implemented lattice surgery by merging and splitting physical qubits.
  • Performed quantum non-demolition measurements using local, entangling gates, and auxiliary qubit measurements.

Main Results:

  • Successfully demonstrated lattice surgery between two logical qubits.
  • Achieved entanglement between the two logical qubits.
  • Implemented logical state teleportation between the logical qubits.

Conclusions:

  • The experimental realization of lattice surgery is a significant step towards efficient fault-tolerant quantum computation.
  • Demonstrated fundamental building blocks for quantum computation using lattice surgery.
  • This work paves the way for scalable quantum information processing.