BPS fivebrane stars. Part II. Fluctuations

Journal Article · 06 February 2024 · Journal of High Energy Physics (Online)

DOI: https://doi.org/10.1007/jhep02(2024)034 · OSTI ID:2481523

Martinec, Emil J.  ^[1]; Zigdon, Yoav ^[2]

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1. University of Chicago, IL (United States)
2. University of Cambridge (United Kingdom)

We investigate quantum fluctuations of metric components in coherent 1/2-BPS bound states of n1 fundamental strings and n₅ NS5-branes. The leading order contribution in an expansion in 1/(n₁n₅) is calculated via a combination of analytical and numerical methods. We find that the fluctuations are small away from a tiny distance from the source, comparable to the 6d Planck scale. Comparing this result with an analysis in the literature of fluctuations in the maximally mixed state, we conclude that the large fluctuations previously found for the latter are statistical rather than quantum in nature, and that perturbative string theory provides an accurate description of these backgrounds.

• Research Organization: University of Chicago, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• Grant/Contract Number: SC0009924
• OSTI ID: 2481523
• Journal Information: Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 2 Vol. 2024; ISSN 1029-8479
• Publisher: Springer NatureCopyright Statement
• Country of Publication: United States
• Language: English