Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Geometry of Entanglement Sudden Death: Explicit Examples   In open quantum systems, entanglement can vanish faster than coherence. This
phenomenon is usually called sudden death of entanglement. In [M. O. Terra
Cunha, New J. Phys. 9, 237 (2007)] a geometrical explanation was offered and a
classification of all possible scenarios was given. Some classes were
exemplified, but it was still an open question whether there were examples for
the other ones. This was solved in [R.C. Drumond and M.O. Terra Cunha,
arXiv:0809.4445v1]. Here we briefly review the problem, state our results in a
precise way, discuss the generality of the approach, and add some speculative
desirable generalizations.

29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
9
The categories of this paper are: nlin