Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A single-world consistent interpretation of quantum mechanics from
  fundamental time and length uncertainties   Within ordinary ---unitary--- quantum mechanics there exist global protocols
that allow to verify that no definite event ---an outcome to which a
probability can be associated--- occurs. Instead, states that start in a
coherent superposition over possible outcomes always remain as a superposition.
We show that, when taking into account fundamental errors in measuring length
and time intervals, that have been put forward as a consequence of a
conjunction of quantum mechanical and general relativity arguments, there are
instances in which such global protocols no longer allow to distinguish whether
the state is in a superposition or not. All predictions become identical as if
one of the outcomes occurs, with probability determined by the state. We use
this as a criteria to define events, as put forward in the Montevideo
Interpretation of Quantum Mechanics. We analyze in detail the occurrence of
events in the paradigmatic case of a particle in a superposition of two
different locations. We argue that our approach provides a consistent (C)
single-world (S) picture of the universe, thus allowing an economical way out
of the limitations imposed by a recent theorem by Frauchiger and Renner showing
that having a self-consistent single-world description of the universe is
incompatible with quantum theory. In fact, the main observation of this paper
may be stated as follows: If quantum mechanics is extended to include
gravitational effects to a QG theory, then QG, S, and C are satisfied.

20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom