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Drag of superfluid current in bilayer Bose systems
An effect of nondissipative drag of a superfluid flow in a system of two Bose gases confined in two parallel quasi-two-dimensional traps is studied. Using an approach based on introduction of density and phase operators, we compute the drag current at zero and finite temperatures for arbitrary ra...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2004
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| Series: | Физика низких температур |
| Subjects: | |
| Online Access: | http://dspace.nbuv.gov.ua/handle/123456789/120050 |
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| Summary: | An effect of nondissipative drag of a superfluid flow in a system of two Bose gases confined in
two parallel quasi-two-dimensional traps is studied. Using an approach based on introduction of
density and phase operators, we compute the drag current at zero and finite temperatures for arbitrary
ratio of particle densities in the adjacent layers. We demonstrate that in a system of two
ring-shaped traps the «drag force» influences the drag trap in the same way as an external magnetic
flux influences a superconducting ring. This allows one to use the drag effect to control persistent
current states in superfluids and opens up the possibility of implementing a Bose analog of
the superconducting Josephson flux qubit. |
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