Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Revealing nonclassicality beyond Gaussian states via a single marginal
  distribution   A standard method to obtain information on a quantum state is to measure
marginal distributions along many different axes in phase space, which forms a
basis of quantum state tomography. We theoretically propose and experimentally
demonstrate a general framework to manifest nonclassicality by observing a
single marginal distribution only, which provides a novel insight into
nonclassicality and a practical applicability to various quantum systems. Our
approach maps the 1-dim marginal distribution into a factorized 2-dim
distribution by multiplying the measured distribution or the vacuum-state
distribution along an orthogonal axis. The resulting fictitious Wigner function
becomes unphysical only for a nonclassical state, thus the negativity of the
corresponding density operator provides an evidence of nonclassicality.
Furthermore, the negativity measured this way yields a lower bound for
entanglement potential---a measure of entanglement generated using a
nonclassical state with a beam splitter setting that is a prototypical model to
produce continuous-variable (CV) entangled states. Our approach detects both
Gaussian and non-Gaussian nonclassical states in a reliable and efficient
manner. Remarkably, it works regardless of measurement axis for all
non-Gaussian states in finite-dimensional Fock space of any size, also
extending to infinite-dimensional states of experimental relevance for CV
quantum informatics. We experimentally illustrate the power of our criterion
for motional states of a trapped ion confirming their nonclassicality in a
measurement-axis independent manner. We also address an extension of our
approach combined with phase-shift operations, which leads to a stronger test
of nonclassicality, i.e. detection of genuine non-Gaussianity under a CV
measurement.

18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math