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|Title: ||Asymmetric long Josephson junction acting as a ratchet for a quantum field|
|Authors: ||Sboychakov, A.O.|
Rakhmanov, Alexander L.
|Issue Date: ||2010|
|Publisher: ||© American Physical Society|
|Citation: ||SBOYCHAKOV, A.O. ... et al., 2010. Asymmetric long Josephson junction acting as a ratchet for a quantum field. Physical Review Letters, 104 (19), 190602, 4pp.|
|Abstract: ||We study the escape rate of flux quanta in a long Josephson junction having an asymmetric spatial inhomogeneous critical current density. Such a junction can behave as a ratchet when driven by an ac current in the presence of a magnetic field. This rectification gives rise to a dc voltage Vdc across the junction. The usual approach of particlelike tunneling cannot describe this rectification, and a quantum field theory description is required. We also show that, under specific conditions, the rectification direction, and consequently Vdc, can change its sign when varying the temperature T near the crossover temperature T* between the quantum and classical regimes.|
|Description: ||This article was published in the journal, Physical Review Letters [© American Physical Society].|
|Publisher Link: ||http://dx.doi.org/10.1103/PhysRevLett.104.190602|
|Appears in Collections:||Published Articles (Physics)|
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