Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Closed timelike curves, superluminal signals, and "free will" in
  universal quantum mechanics   We explore some implications of the hypothesis that quantum mechanics (QM) is
universal, i.e., that QM does not merely describe information accessible to
observers, but that it also describes the observers themselves. From that point
of view, "free will" (FW) - the ability of experimentalists to make free
choices of initial conditions - is merely an illusion. As a consequence, by
entangling a part of brain (responsible for the illusion of FW) with a distant
particle, one may create nonlocal correlations that can be interpreted as
superluminal signals. In addition, if FW is an illusion, then QM on a closed
timelike curve can be made consistent even without the Deutch nonlinear
consistency constraint.

7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci