Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evidence for interacting two-level systems from the 1/f noise of a
  superconducting resonator   Here we find the increase in 1/f noise of superconducting resonators at low
temperatures to be completely incompatible with the standard tunneling model
(STM) of Two Level Systems (TLS), which has been used to describe low-frequency
noise for over three decades. We revise the STM to include a significant TLS -
TLS interaction. The new model is able to explain the temperature and power
dependence of noise in our measurements, as well as recent studies of
individual TLS lifetimes using superconducting qubits. The measurements were
made possible by implementing an ultra-stable frequency-tracking technique used
in atomic clocks and by producing a superconducting resonator insensitive to
temperature fluctuations. The latter required an epitaxially grown Nb film with
a Pt capping layer to minimize detrimental oxides at all interfaces.

33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys