High-fidelity and Fault-tolerant Teleportation of a Logical Qubit on a Trapped-ion Quantum Computer
Talkat Near-Term Quantum Computers: Fault Tolerance + Benchmarking + Quantum Advantage + Quantum Algorithms · 2024-04-22..04-26·
summary
Quantinuum H2 implements the first fully fault-tolerant logical-qubit teleportation encoded in the [[7,1,3]] Steane (2D color) code, running circuits up to 30 physical qubits with real-time decoding and adaptive syndrome extraction. The protocol teleports six Pauli eigenstates (used to estimate process fidelity), post-selects on Bell-resource verification, and compares transversal versus lattice-surgery implementations: physical ~98%, transversal without QEC ~99%, transversal with QEC ~97%, lattice surgery ~86–88%, showing the QEC cycle injects significant overhead.
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chapters (8)
- 0:00Introduction and roadmap
- 3:36Hardware architecture
- 6:34Quantum state teleportation
- 9:05Logical gate implementations
- 12:55Experimental procedure
- 18:55Lattice surgery protocols
- 22:12Data results and analysis
- 30:10QEC versus QED perspectives
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