Journal article 1324 views 526 downloads
Quantum computations on a topologically encoded qubit
D. Nigg,
M. Muller,
E. A. Martinez,
P. Schindler,
M. Hennrich,
T. Monz,
M. A. Martin-Delgado,
R. Blatt,
Markus Muller
Science, Volume: 345, Issue: 6194, Pages: 302 - 305
Swansea University Author: Markus Muller
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DOI (Published version): 10.1126/science.1253742
Abstract
The construction of a quantum computer remains a fundamental scientific and technological challenge, in particular due to unavoidable noise. Quantum states and operations can be protected from errors using protocols for fault-tolerant quantum computing (FTQC). Here we present a step towards this by...
| Published in: | Science |
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| Published: |
2014
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa28335 |
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| Abstract: |
The construction of a quantum computer remains a fundamental scientific and technological challenge, in particular due to unavoidable noise. Quantum states and operations can be protected from errors using protocols for fault-tolerant quantum computing (FTQC). Here we present a step towards this by implementing a quantum error correcting code, encoding one qubit in entangled states distributed over 7 trapped-ion qubits. We demonstrate the capability of the code to detect one bit flip, phase flip or a combined error of both, regardless on which of the qubits they occur. Furthermore, we apply combinations of the entire set of logical single-qubit Clifford gates on the encoded qubit to explore its computational capabilities. The implemented 7-qubit code is the first realization of a complete Calderbank-Shor-Steane (CSS) code and constitutes a central building block for FTQC schemes based on concatenated elementary quantum codes. It also represents the smallest fully functional instance of the color code, opening a route towards topological FTQC. |
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| Keywords: |
Quantum Computation |
| College: |
Faculty of Science and Engineering |
| Issue: |
6194 |
| Start Page: |
302 |
| End Page: |
305 |