| Issue |
EPL
Volume 89, Number 2, January 2010
|
|
|---|---|---|
| Article Number | 26009 | |
| Number of page(s) | 6 | |
| Section | Condensed Matter: Structural, Mechanical and Thermal Properties | |
| DOI | https://doi.org/10.1209/0295-5075/89/26009 | |
| Published online | 05 February 2010 | |
Josephson mass current dynamics in experiments and simulations within a new model concept
Physikalisches Institut, Universität Bayreuth - 95440 Bayreuth, Germany, EU
Corresponding author: eska@uni-bayreuth.de
Received:
9
August
2009
Accepted:
11
January
2010
Josephson mass currents have been investigated in superfluid 3He-B with high temporal resolution. The experimentally observed dynamics of all DC and AC Josephson effects could be modeled in detail by solving the quantum-phase– controlled equations of motion which could be adjusted for other quantum condensates as well. We show that the 3He π-state, discussed in the literature, might not be a state of 3He but nonlinear dynamics which also dominates the apparent dissipation and oscillation in the Josephson device. Four different modes were identified for Cooper pair oscillations and a pure sinusoidal current phase relationship was found for temperatures down to 0.16 mK where the device can be used as a bolometric detector.
PACS: 67.30.H- – Superfluid phase of 3He / 85.25.Cp – Josephson devices / 74.50.+r – Tunneling phenomena; Josephson effects
© EPLA, 2010
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