Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonlinear squeezing for measurement-based non-Gaussian operations in
  time domain   Quantum non-Gaussian gate is a missing piece to the realization of
continuous-variable universal quantum operations in the optical system. In a
measurement-based implementation of the cubic phase gate, a lowest-order
non-Gaussian gate, non-Gaussian ancillary states that has a property we call
nonlinear squeezing are required. This property, however, has never been
experimentally verified. In this paper, we generate a superposition between a
vacuum state and a single photon state whose nonlinear squeezing are maximized
by the optimization of the superposition coefficients. The nonlinear squeezing
is observed via real-time quadrature measurements, meaning that the generated
states are compatible with the real-time feedforward and are suitable as the
ancillary states for the cubic phase gate in time domain. Moreover, by
increasing the number of the photons, it is expected that nonlinear squeezing
can be further improved. The idea presented here can be readily extended to the
higher-order phase gates [P. Marek et al., Phys. Rev. A 97, 022329 (2018)]. As
such, this work presents an important step to extend the CV quantum information
processing from Gaussian regime to non-Gaussian regime.

14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
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The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
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The categories of this paper are: eess
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The categories of this paper are: astro-ph
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The categories of this paper are: cond-mat