Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Three different manifestations of the quantum Zeno effect   Three different manifestations of the quantum Zeno effect are discussed,
compared and shown to be physically equivalent. We look at frequent projective
measurements, frequent unitary "kicks" and strong continuous coupling. In all
these cases, the Hilbert space of the system splits into invariant "Zeno"
subspaces, among which any transition is hindered.

17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph