Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Probing Vacuum with Variational Methods in Quantum Gravity   We use variational methods to calculate quasilocal energy quantum
corrections. A comparison with the effective potential calculated at quadratic
order is made by means of gaussian wave functionals. The method is a particular
case of the effective action for composite operators used in quantum field
theory. In pure gravity the method is applied for the first time. Implications
on the foam-like scenario are discussed.

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The categories of this paper are: physics
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The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
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The categories of this paper are: cond-mat
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The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th
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The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
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The categories of this paper are: adap-org
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The categories of this paper are: hep-lat
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The categories of this paper are: q-bio
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The categories of this paper are: eess
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The categories of this paper are: chem-ph
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The categories of this paper are: supr-con
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The categories of this paper are: q-fin
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The categories of this paper are: econ