TL;DR
This paper explores the properties of D-branes within the framework of D-duality, analyzing their world-sheet descriptions, the behavior of non-static D-branes, and quantum string production, revealing that background string production exceeds that from D-brane decay.
Contribution
It provides a detailed world-sheet analysis of D-branes in D-duality backgrounds and examines quantum string production, extending previous theoretical understanding.
Findings
Closed string production from the background is significantly larger than from D-branes decaying.
Derived the world-sheet correspondence for static D-branes.
Analyzed the fate of non-static D-branes from the world-sheet perspective.
Abstract
We further investigate the dimensional duality (D-duality) proposed in arXiv:0705.0550 by mainly focusing on the properties of D-branes in this background. We derive the world-sheet correspondence of static D-branes, and discuss the fate of non-static D-branes from the world-sheet viewpoint. The quantum string production with or without D-branes is also studied from the time-like Liouville theory. We find that the closed string production from the background is much larger than that from D-branes decaying into nothing.
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