Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 118, Issue 36, Pages -Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.2026250118
Keywords
quantum computing; quantum error correction; quantum teleportation; quantum entanglement
Categories
Funding
- National Natural Science Foundation of China
- Chinese Academy of Sciences
- National Fundamental Research Program
- Anhui Initiative in Quantum Information Technologies
- Ministry of Education, Culture, Sports, Science and Technology Quantum Leap Flagship Program [JPMXS0118069605]
- Austrian Federal Ministry of Education, Science and Research
- University of Vienna
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Quantum gate teleportation proposes an elegant solution to replace fragile nontransverse inline gates with specific highly entangled offline resource states for implementing nontransverse gates in circuits. By creating maximally entangled states and teleporting quantum information, the scheme can achieve fidelities up to 0.786 and be fully fault tolerant for future large-scale quantum technologies.
Quantum error correction is an essential tool for reliably performing tasks for processing quantum information on a large scale. However, integration into quantum circuits to achieve these tasks is problematic when one realizes that nontransverse operations, which are essential for universal quantum computation, lead to the spread of errors. Quantum gate teleportation has been proposed as an elegant solution for this. Here, one replaces these fragile, nontransverse inline gates with the generation of specific, highly entangled offline resource states that can be teleported into the circuit to implement the nontransverse gate. As the first important step, we create a maximally entangled state between a physical and an error-correctable logical qubit and use it as a teleportation resource. We then demonstrate the teleportation of quantum information encoded on the physical qubit into the error-corrected logical qubit with fidelities up to 0.786. Our scheme can be designed to be fully fault tolerant so that it can be used in future large-scale quantum technologies.
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