Magnetic flux noise in the three Josephson junctions superconducting ring
We analyze the influence of noise on magnetic properties of a superconducting loop which contains three Josephson junctions. This circuit is a classical analog of a persistent current (flux) qubit. A loop supercurrent induced by external magnetic field at the presence of thermal fluctuations is ca...
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| Опубліковано в: : | Физика низких температур |
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| Дата: | 2008 |
| Автори: | , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2008
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| Теми: | |
| Онлайн доступ: | https://nasplib.isofts.kiev.ua/handle/123456789/116976 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Magnetic flux noise in the three Josephson junctions superconducting ring / E. Il’ichev, A.N. Omelyanchouk // Физика низких температур. — 2008. — Т. 34, № 6. — С. 520–524. — Бібліогр.: 11 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Резюме: | We analyze the influence of noise on magnetic properties of a superconducting loop which contains three
Josephson junctions. This circuit is a classical analog of a persistent current (flux) qubit. A loop supercurrent
induced by external magnetic field at the presence of thermal fluctuations is calculated. In order to
get connection with experiment we calculate the impedance of the low-frequency tank circuit which is inductively
coupled with a loop of interest. We compare obtained results with the results in quantum mode —
when the three junction loop exhibits quantum tunneling of the magnetic flux. We demonstrate that the
tank-loop impedance in the classical and quantum modes have different temperature dependence and can be
easily distinguished experimentally.
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| ISSN: | 0132-6414 |