Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Experimental Study of Active LRC Circuits with PT-Symmetries   Mutually coupled modes of a pair of active LRC circuits, one with
amplification and another with an equivalent amount of attenuation, provide an
experimental realization of a wide class of systems where gain/loss mechanisms
break the Hermiticity while preserving parity-time PT symmetry. For a value PT
of the gain/loss strength parameter the eigen-frequencies undergo a spontaneous
phase transition from real to complex values, while the normal modes coalesce
acquiring a definite chirality. The consequences of the phase-transition in the
spatiotemporal energy evolution are also presented.

31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga