Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Validating a Two Qubit Non-Stoquastic Hamiltonian in Quantum Annealing   We propose a two qubit experiment for validating tunable antiferromagnetic
$XX$ interactions in quantum annealing. Such interactions allow the
time-dependent Hamiltonian to be non-stoquastic, and the instantaneous ground
state can have negative amplitudes in the computational basis. Our construction
relies on how the degeneracy of the Ising Hamiltonian's ground states is broken
away from the end point of the anneal: above a certain value of the
antiferromagnetic $XX$ interaction strength, the perturbative ground state at
the end of the anneal changes from a symmetric to an antisymmetric state. This
change is associated with a suppression of one of the Ising ground states,
which can then be detected using solely computational basis measurements. We
show that a semiclassical approximation of the annealing protocol fails to
reproduce this feature, making it a candidate `quantum signature' of the
evolution.

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The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
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The categories of this paper are: econ
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
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The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org