Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Critique of PT-Symmetric Quantum Mechanics   We study the physical content of the PT-symmetric complex extension of
quantum mechanics as proposed in Bender et al, Phys. Rev. Lett. 80, 5243 (1998)
and 89, 270401 (2002), and show that as a fundamental probabilistic physical
theory it is neither an alternative to nor an extension of ordinary quantum
mechanics. We demonstrate that the definition of a physical observable given in
the above papers is inconsistent with the dynamical aspect of the theory and
offer a consistent notion of an observable.

12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg