Effect of temperature on the coherence time of a parabolic quantum dot qubit
The effects of the temperature on the coherence time of a parabolic quantum dot (PQD) qubit are investigated by using the variational method of Pekar type. We obtain the ground and the first excited states’ eigenenergies and the corresponding eigenfunctions of an electron strongly coupled to bulk lo...
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| Published in: | Физика низких температур |
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| Date: | 2015 |
| Main Authors: | , |
| Format: | Article |
| Language: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2015
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| Online Access: | https://nasplib.isofts.kiev.ua/handle/123456789/122043 |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Effect of temperature on the coherence time of a parabolic quantum dot qubit / Wei Xiao, Hong-Wei Wang // Физика низких температур. — 2015. — Т. 41, № 3. — С. 267-270. — Бібліогр.: 26 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862746145845936128 |
|---|---|
| author | Wei Xiao Hong-Wei Wang |
| author_facet | Wei Xiao Hong-Wei Wang |
| citation_txt | Effect of temperature on the coherence time of a parabolic quantum dot qubit / Wei Xiao, Hong-Wei Wang // Физика низких температур. — 2015. — Т. 41, № 3. — С. 267-270. — Бібліогр.: 26 назв. — англ. |
| collection | DSpace DC |
| container_title | Физика низких температур |
| description | The effects of the temperature on the coherence time of a parabolic quantum dot (PQD) qubit are investigated by using the variational method of Pekar type. We obtain the ground and the first excited states’ eigenenergies and the corresponding eigenfunctions of an electron strongly coupled to bulk longitudinal optical phonons in the PQD. This two-level PQD system may be employed as a single qubit. The phonon spontaneous emission causes the decoherence of the qubit. We find that the coherence time will decrease with increasing temperature. It is an increasing function of the effective confinement length, whereas it is decreasing one of the polaron radius. We find that by changing the temperature, the effective confinement length and the polaron radius one can adjust the coherence time. Our research results would be useful for the design and implementation of the solid-state quantum computation.
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| first_indexed | 2025-12-07T20:44:18Z |
| format | Article |
| fulltext | |
| id | nasplib_isofts_kiev_ua-123456789-122043 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 0132-6414 |
| language | English |
| last_indexed | 2025-12-07T20:44:18Z |
| publishDate | 2015 |
| publisher | Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| record_format | dspace |
| spelling | Wei Xiao Hong-Wei Wang 2017-06-26T05:19:10Z 2017-06-26T05:19:10Z 2015 Effect of temperature on the coherence time of a parabolic quantum dot qubit / Wei Xiao, Hong-Wei Wang // Физика низких температур. — 2015. — Т. 41, № 3. — С. 267-270. — Бібліогр.: 26 назв. — англ. 0132-6414 PACS: 71.38.–k, 73.21.La63.20.kd https://nasplib.isofts.kiev.ua/handle/123456789/122043 The effects of the temperature on the coherence time of a parabolic quantum dot (PQD) qubit are investigated by using the variational method of Pekar type. We obtain the ground and the first excited states’ eigenenergies and the corresponding eigenfunctions of an electron strongly coupled to bulk longitudinal optical phonons in the PQD. This two-level PQD system may be employed as a single qubit. The phonon spontaneous emission causes the decoherence of the qubit. We find that the coherence time will decrease with increasing temperature. It is an increasing function of the effective confinement length, whereas it is decreasing one of the polaron radius. We find that by changing the temperature, the effective confinement length and the polaron radius one can adjust the coherence time. Our research results would be useful for the design and implementation of the solid-state quantum computation. This project was supported by the National Science Foundation of China under Grant No. 11464033. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур Низкоразмерные и неупорядоченные системы Effect of temperature on the coherence time of a parabolic quantum dot qubit Article published earlier |
| spellingShingle | Effect of temperature on the coherence time of a parabolic quantum dot qubit Wei Xiao Hong-Wei Wang Низкоразмерные и неупорядоченные системы |
| title | Effect of temperature on the coherence time of a parabolic quantum dot qubit |
| title_full | Effect of temperature on the coherence time of a parabolic quantum dot qubit |
| title_fullStr | Effect of temperature on the coherence time of a parabolic quantum dot qubit |
| title_full_unstemmed | Effect of temperature on the coherence time of a parabolic quantum dot qubit |
| title_short | Effect of temperature on the coherence time of a parabolic quantum dot qubit |
| title_sort | effect of temperature on the coherence time of a parabolic quantum dot qubit |
| topic | Низкоразмерные и неупорядоченные системы |
| topic_facet | Низкоразмерные и неупорядоченные системы |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/122043 |
| work_keys_str_mv | AT weixiao effectoftemperatureonthecoherencetimeofaparabolicquantumdotqubit AT hongweiwang effectoftemperatureonthecoherencetimeofaparabolicquantumdotqubit |