Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Improving the accuracy of the energy estimation by combining quantum
  annealing with classical computation   Quantum chemistry calculations are important applications of quantum
annealing. For practical applications in quantum chemistry, it is essential to
estimate a ground state energy of the Hamiltonian with chemical accuracy.
However, there are no known methods to guarantee the accuracy of the estimation
of the energy calculated by quantum annealing. Here, we propose a way to
improve the accuracy of the estimate of the ground state energy by combining
quantum annealing with classical computation. In our scheme, before running the
QA, we need a pre-estimation of the energies of the ground state and first
excited state with some error bars (corresponding to possible estimation error)
by performing classical computation with some approximations. We show that, if
an expectation value and variance of the energy of the state after the QA are
smaller than certain threshold values (that we can calculate from the
pre-estimation), the QA provides us with a better estimate of the ground state
energy than that of the pre-estimation. Since the expectation value and
variance of the energy can be experimentally measurable by the QA, our results
pave the way for accurate estimation of the ground state energy with the QA.

17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin