Demonstration of a quantum error detection code using a square lattice of four superconducting qubits
Top Cited Papers
Open Access
- 29 April 2015
- journal article
- research article
- Published by Springer Science and Business Media LLC in Nature Communications
- Vol. 6 (1), 6979
- https://doi.org/10.1038/ncomms7979
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.Keywords
This publication has 28 references indexed in Scilit:
- Quantum computations on a topologically encoded qubitScience, 2014
- Surface codes: Towards practical large-scale quantum computationPhysical Review A, 2012
- Experimental Implementation of Encoded Logical Qubit Operations in a Perfect Quantum Error Correcting CodePhysical Review Letters, 2012
- Demonstration of Sufficient Control for Two Rounds of Quantum Error Correction in a Solid State Ensemble Quantum Information ProcessorPhysical Review Letters, 2011
- Experimental Repetitive Quantum Error CorrectionScience, 2011
- Fault-Tolerant Quantum Computation with High Threshold in Two DimensionsPhysical Review Letters, 2007
- Realization of quantum error correctionNature, 2004
- Fault-tolerant quantum computation by anyonsAnnals of Physics, 2002
- Topological quantum memoryJournal of Mathematical Physics, 2002
- Experimental Quantum Error CorrectionPhysical Review Letters, 1998