| Paper Abstract and Keywords |
| Presentation |
2019-05-21 15:50
Quantum Computer Status Check via Output Random Numbers Sequence
Kentaro Tamura, Yutaka Shikano (Keio Univ.) |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
The stochastic nature of quantum computers allows the generation of true random numbers. This is because the measurement outcome is probabilistic under the axioms of quantum physics. While the classical computer’s output can be predicted with knowledge of its input and program, the classical output of a quantum computer cannot be predicted [M. Herrero-Collantes and J. C. Garcia-Escartin, Rev. Mod. Phys. 89, 015004 (2017)]. This unpredictability is essential to the generation of true random numbers. In theory, therefore, quan- tum computers should be capable of producing true random numbers. We show that the output generated by a 20-qubit superconducting quantum computer (IBM 20Q Tokyo) with a simple circuit using the Hadamard gate on all 20 qubits does not qualify as true random numbers. The reason behind this is the existence of errors. Firstly, the probability of 0s and 1s of individual qubits were not equal, thereby causing a bias in the output. Secondly, the output of the qubits were correlated. However, with a combination of the Samuelson’s extractor and the von Neumann’s extractor, uniform bit sequences were extracted. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
true random number generator / quantum random number generator / IBM Q / randomness extraction / min-entropy / / / |
| Reference Info. |
IEICE Tech. Rep. |
| Paper # |
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| Date of Issue |
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| ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
| Download PDF |
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| Conference Information |
| Committee |
QIT |
| Conference Date |
2019-05-20 - 2019-05-21 |
| Place (in Japanese) |
(See Japanese page) |
| Place (in English) |
Kyushu University, Chikushi Campus |
| Topics (in Japanese) |
(See Japanese page) |
| Topics (in English) |
Quantum Information |
| Paper Information |
| Registration To |
QIT |
| Conference Code |
2019-05-QIT |
| Language |
English (Japanese title is available) |
| Title (in Japanese) |
(See Japanese page) |
| Sub Title (in Japanese) |
(See Japanese page) |
| Title (in English) |
Quantum Computer Status Check via Output Random Numbers Sequence |
| Sub Title (in English) |
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| Keyword(1) |
true random number generator |
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quantum random number generator |
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IBM Q |
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randomness extraction |
| Keyword(5) |
min-entropy |
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| 1st Author's Name |
Kentaro Tamura |
| 1st Author's Affiliation |
Keio University (Keio Univ.) |
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Yutaka Shikano |
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Keio University (Keio Univ.) |
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| Date Time |
2019-05-21 15:50:00 |
| Presentation Time |
20 |
| Registration for |
QIT |
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