| Paper Abstract and Keywords |
| Presentation |
2016-05-30 13:00
[Poster Presentation]
Estimation of Parameters in a Qubit Channel via Sequential Measurements
Teruo Matsubara, Kazuya Yuasa (Waseda Univ.) |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
We discuss the estimation of parameters contained in a quantum channel.
In the standard strategy, we send the quantum system prepared in a certain input state into the channel, and measure some observable in the output state.
We perform such an experiment many times to collect measurement data, from which we try to estimate the target parameter in the channel.
In this study, in contrast, we consider a different scheme for parameter estimation: we repeat the application of the channel followed by a measurement without resetting the state of the system every after the measurement.
We study such a sequential scheme for parameter estimation with an amplitude damping channel for a single qubit at a finite temperature, and show that, in contrast to the standard strategy based on independent and identical experiments, (i) the parameter can be estimated with an arbitrary initial state provided that the channel satisfies a certain criterion, (ii) the correlations among the collected data can be exploited to enhance the precision of the estimation, and (iii) the performance of the scheme is improved by increasing the temperature of the environment. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
quantum parameter estimation / Fisher information / quantum measurement / quantum ergodic channel / / / / |
| Reference Info. |
IEICE Tech. Rep. |
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| Conference Information |
| Committee |
QIT |
| Conference Date |
2016-05-30 - 2016-05-31 |
| Place (in Japanese) |
(See Japanese page) |
| Place (in English) |
Kochi University of Technology Eikokuji campus |
| Topics (in Japanese) |
(See Japanese page) |
| Topics (in English) |
Quantum Information |
| Paper Information |
| Registration To |
QIT |
| Conference Code |
2016-05-QIT |
| Language |
Japanese |
| Title (in Japanese) |
(See Japanese page) |
| Sub Title (in Japanese) |
(See Japanese page) |
| Title (in English) |
Estimation of Parameters in a Qubit Channel via Sequential Measurements |
| Sub Title (in English) |
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| Keyword(1) |
quantum parameter estimation |
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Fisher information |
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quantum measurement |
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quantum ergodic channel |
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| 1st Author's Name |
Teruo Matsubara |
| 1st Author's Affiliation |
Waseda University (Waseda Univ.) |
| 2nd Author's Name |
Kazuya Yuasa |
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Waseda University (Waseda Univ.) |
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| Speaker |
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| Date Time |
2016-05-30 13:00:00 |
| Presentation Time |
120 minutes |
| Registration for |
QIT |
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