Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Switching Current Measurements in Josephson Rings   We present switching current measurements in niobium-aluminum oxide-niobium
underdamped Josephson rings. Underdamped Josephson rings display hysteretic
current-voltage curves which can be characterized by their switching current,
the value of applied current at which the junctions switch to the energy-gap
voltage. The value of the switching current is strongly affected by temperature
and by the presence of fluxons in the system. We observe a very small voltage
(0.2 nV) across the ring prior to switching, indicating a low-velocity fluxon
diffusion state before the jump to a full running state. In analogy with
previous work on single junctions, we analyze the switching current data with
the process of thermal activation over a dissipation barrier, where the system
switches from a low velocity state to a high velocity state. We find that our
data agrees qualitatively with this description, further supporting the
observation of fluxon diffusion.

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The categories of this paper are: chem-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: stat
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The categories of this paper are: gr-qc
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The categories of this paper are: nucl-ex
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The categories of this paper are: ao-sci
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The categories of this paper are: nlin
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The categories of this paper are: cs
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The categories of this paper are: eess
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The categories of this paper are: math
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The categories of this paper are: plasm-ph
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The categories of this paper are: supr-con
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The categories of this paper are: hep-th
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The categories of this paper are: dg-ga
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The categories of this paper are: quant-ph
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The categories of this paper are: acc-phys