Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Some remarks on the dS conjecture, fluxes and K-theory in IIB toroidal
  compactifications   In this note we present a description on the implications on the refined dS
Swampland conjecture by considering non-BPS states in type IIB toroidal
compactifications . We concentrate on a model T-dual to type I theory for which
the total K-theory charge of the non-BPS states vanishes on the six-dimensional
torus modded out by an orientifold three-plane. Particularly we consider the
presence of non-BPS five branes wrapping internal two-cycles. We comment on the
instability of this state by the presence of tachyon modes and the apparent
violation of the refined dS conjecture at the minimum of the tachyon potential.
The conjecture seems to be valid once we take into account that discrete
K-theory charge vanishes. We also describe some issues related to the presence
of NS-NS fluxes required to stabilize some moduli since they trigger the
appearance of Freed-Witten anomalies. Cancellation of these anomalies implies a
topological transformation between non-BPS states and fluxes with the same
discrete K-theory charge. After the transition we observe that the dS vacuum
constructed from the presence of non-BPS states is also unstable.

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The categories of this paper are: cs
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The categories of this paper are: solv-int
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The categories of this paper are: q-alg
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-bio
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The categories of this paper are: alg-geom
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The categories of this paper are: nlin
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The categories of this paper are: atom-ph
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The categories of this paper are: q-fin
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The categories of this paper are: dg-ga
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The categories of this paper are: math
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The categories of this paper are: funct-an
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The categories of this paper are: gr-qc
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The categories of this paper are: physics