Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Surface tension of the horizon   The idea of treating the horizon of a black hole as a stretched membrane with
surface tension has a long history. In this work, we discuss the microscopic
origin of the surface tension of the horizon in quantum pictures of spaces,
which are Bose-Einstein condensates of gravitons. The horizon is a phase
interface of gravitons, the surface tension of which is found to be a result of
the difference in the strength of the interaction between the gravitons on its
two sides. The gravitational source, such as a Schwarzschild black hole,
creates a transitional zone by changing the energy and distribution of its
surrounding gravitons. Archimedes' principle for gravity can be expressed as
follows: "the gravity on an object is equal to the weight of the gravitons that
it displaces."

34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci