Abstract:
:The ability to detect and deal with errors when manipulating quantum systems is a fundamental requirement for fault-tolerant quantum computing. Unlike classical bits that are subject to only digital bit-flip errors, quantum bits are susceptible to a much larger spectrum of errors, for which any complete quantum error-correcting code must account. Whilst classical bit-flip detection can be realized via a linear array of qubits, a general fault-tolerant quantum error-correcting code requires extending into a higher-dimensional lattice. Here we present a quantum error detection protocol on a two-by-two planar lattice of superconducting qubits. The protocol detects an arbitrary quantum error on an encoded two-qubit entangled state via quantum non-demolition parity measurements on another pair of error syndrome qubits. This result represents a building block towards larger lattices amenable to fault-tolerant quantum error correction architectures such as the surface code.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Córcoles AD,Magesan E,Srinivasan SJ,Cross AW,Steffen M,Gambetta JM,Chow JMdoi
10.1038/ncomms7979subject
Has Abstractpub_date
2015-04-29 00:00:00pages
6979issn
2041-1723pii
ncomms7979journal_volume
6pub_type
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