Paul Scherrer Institute and ETH Zurich Demonstrate Fault-Tolerant Lattice Surgery on Superconducting Qubits
Summary
Researchers from the Paul Scherrer Institute and ETH Zurich have successfully executed a logical quantum operation on a 17-qubit superconducting processor, showcasing a method for entangling logical qubits while implementing quantum error correction protocols, as detailed in Nature Physics.
Key Insights
What is lattice surgery in quantum computing?
Lattice surgery is a technique for performing fault-tolerant operations between logical qubits encoded in surface codes by merging and splitting their lattice patches, enabling entanglement without direct qubit interactions while maintaining error correction.
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What are logical qubits and how do they differ from physical qubits?
Logical qubits are robust quantum bits encoded across multiple physical qubits using error-correcting codes like the surface code to protect against errors, whereas physical qubits are individual noisy quantum bits; in this experiment, one logical qubit was encoded in 17 physical superconducting qubits.
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