Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A loophole-free Wheeler-delayed-choice experiment   Wheeler's delayed-choice experiment investigates the indeterminacy of
wave-particle duality and the role played by the measurement apparatus in
quantum theory. Due to the inconsistency with classical physics, it has been
generally believed that it is not possible to reproduce the delayed-choice
experiment using a hidden variable theory. Recently, it was shown that this
assumption was incorrect, and in fact Wheeler's delayed-choice experiment can
be explained by a causal two dimensional hidden-variable theory [R. Chaves, G.
B. Lemos, and J. Pienaar, Phys. Rev. Lett. 120, 190401 (2018)]. Here, we carry
out an experiment of a device-independent delayed-choice experiment using
photon states that are space-like separated, and demonstrate a loophole-free
version of the delayed-choice protocol that is consistent with quantum theory
but inconsistent with any causal two-dimensional hidden variable theory. This
salvages Wheeler's thought experiment and shows that causality can be used to
test quantum theory in a complementary way to the Bell and Leggett-Garg tests.

30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph