Abstract
| Original language | English |
|---|---|
| Article number | 6983 |
| Journal | Nature Communications |
| Volume | 6 |
| DOIs | |
| Publication status | Published - 2015 |
| MoE publication type | A1 Journal article-refereed |
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Keywords
- Applied physics
- Quantum information
- Qubits
- Superconducting properties and materials
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Detecting bit-flip errors in a logical qubit using stabilizer measurements. / Ristè, D.; Poletto, S.; Huang, M.-Z.; Bruno, A.; Vesterinen, V.; Saira, O-P.; DiCarlo, L. (Corresponding Author).
In: Nature Communications, Vol. 6, 6983, 2015.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Detecting bit-flip errors in a logical qubit using stabilizer measurements
AU - Ristè, D.
AU - Poletto, S.
AU - Huang, M.-Z.
AU - Bruno, A.
AU - Vesterinen, V.
AU - Saira, O-P.
AU - DiCarlo, L.
PY - 2015
Y1 - 2015
N2 - Quantum data are susceptible to decoherence induced by the environment and to errors in the hardware processing it. A future fault-tolerant quantum computer will use quantum error correction to actively protect against both. In the smallest error correction codes, the information in one logical qubit is encoded in a two-dimensional subspace of a larger Hilbert space of multiple physical qubits. For each code, a set of non-demolition multi-qubit measurements, termed stabilizers, can discretize and signal physical qubit errors without collapsing the encoded information. Here using a five-qubit superconducting processor, we realize the two parity measurements comprising the stabilizers of the three-qubit repetition code protecting one logical qubit from physical bit-flip errors. While increased physical qubit coherence times and shorter quantum error correction blocks are required to actively safeguard the quantum information, this demonstration is a critical step towards larger codes based on multiple parity measurements.
AB - Quantum data are susceptible to decoherence induced by the environment and to errors in the hardware processing it. A future fault-tolerant quantum computer will use quantum error correction to actively protect against both. In the smallest error correction codes, the information in one logical qubit is encoded in a two-dimensional subspace of a larger Hilbert space of multiple physical qubits. For each code, a set of non-demolition multi-qubit measurements, termed stabilizers, can discretize and signal physical qubit errors without collapsing the encoded information. Here using a five-qubit superconducting processor, we realize the two parity measurements comprising the stabilizers of the three-qubit repetition code protecting one logical qubit from physical bit-flip errors. While increased physical qubit coherence times and shorter quantum error correction blocks are required to actively safeguard the quantum information, this demonstration is a critical step towards larger codes based on multiple parity measurements.
KW - Applied physics
KW - Quantum information
KW - Qubits
KW - Superconducting properties and materials
U2 - 10.1038/ncomms7983
DO - 10.1038/ncomms7983
M3 - Article
VL - 6
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
M1 - 6983
ER -