Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Coherent phase slips in superconducting nanorings   We study quantum fluctuations of persistent current in a small
superconducting ring. Based on a microscopic model of the ring we argue that
under certain conditions such ring will exhibit coherent quantum phase slips,
similar to those in a flux qubit. We evaluate the frequency of such coherent
oscillations and find that it is strongly dependent on wire's diameter
primarily due to the large momentum released by the condensate as a result of a
phase slip event. We also find that the value of such frequency is not a
self-averaging quantity, that is, it depends on a particular realization of the
static impurity potential.

9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an