Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Recovering the Negative Mode for Type B Coleman-de Luccia Instantons   The usual (type A) thin-wall Coleman-de Luccia instanton is made by a
bigger-than-half sphere of the false vacuum and a smaller-than-half sphere of
the true vacuum. It has a the standard O(4) symmetric negative mode associated
with changing the size of false vacuum region. On the other hand, the type B
instanton, made by two smaller-than-half spheres, was believed to have lost
this negative mode. We argue that such belief is misguided due to an
over-restriction on Euclidean path integral. We introduce the idea of a "purely
geometric junction" to visualize why such restriction could be removed, and
then explicitly construct this negative mode. We also show that type B and type
A instantons have the same thermal interpretation for mediating tunnelings.

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The categories of this paper are: hep-ex
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The categories of this paper are: math
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The categories of this paper are: stat
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The categories of this paper are: patt-sol
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The categories of this paper are: mtrl-th
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The categories of this paper are: bayes-an
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The categories of this paper are: acc-phys
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The categories of this paper are: eess
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The categories of this paper are: supr-con
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The categories of this paper are: adap-org
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The categories of this paper are: chem-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: nucl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: plasm-ph
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The categories of this paper are: physics