Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Is a time symmetric interpretation of quantum theory possible without
  retrocausality?   Huw Price has proposed an argument that suggests a time-symmetric ontology
for quantum theory must necessarily be retrocausal, i.e. it must involve
influences that travel backwards in time. One of Price's assumptions is that
the quantum state is a state of reality. However, one of the reasons for
exploring retrocausality is that it offers the potential for evading the
consequences of no-go theorems, including recent proofs of the reality of the
quantum state. Here, we show that this assumption can be replaced by a
different assumption, called $\lambda$-mediation, that plausibly holds
independently of the status of the quantum state. We also reformulate the other
assumptions behind the argument to place them in a more general framework and
pin down the notion of time symmetry involved more precisely. We show that our
assumptions imply a timelike analogue of Bell's local causality criterion and,
in doing so, give a new interpretation of timelike violations of Bell
inequalities. Namely, they show the impossibility of a (non-retrocausal)
time-symmetric ontology.

22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat