TL;DR
This paper investigates tachyonic modes on type 0 NS5-branes, demonstrating their correspondence with bulk tachyon modes and elucidating how twisted modes reproduce gauge fields on NS5-branes, using T-duality and classical solutions.
Contribution
It reveals the detailed relationship between twisted tachyonic modes at singularities and bulk tachyon modes on NS5-branes, providing new insights into their spectrum and gauge field emergence.
Findings
Tachyonic spectrum is reproduced by bulk tachyon modes on NS5-branes.
Twisted modes at singularities correspond to gauge fields on NS5-branes.
The analysis uses T-duality and classical NS5-brane solutions.
Abstract
Via T-duality, a stack of unwrapped type 0 NS5-branes is transformed into a Kaluza-Klein monopole with A_n type singularity at its center. The spectrum of twisted modes at the singularity contains tachyonic modes. We show that, in certain parameter region, this tachyonic spectrum is completely reproduced as modes of the bulk tachyon field localized on a classical NS5-brane solution. In passing, we show how twisted modes at the singularity reproduce gauge fields on stacks of NS5-branes.
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