A Worldsheet Description of Instant Folded Strings

Akikazu Hashimoto; Nissan Itzhaki; Uri Peleg

A Worldsheet Description of Instant Folded Strings

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arxiv 2209.04988 v1 pith:YMG7ZQOI submitted 2022-09-12 hep-th

Akikazu Hashimoto , Nissan Itzhaki , Uri Peleg This is my paper · ORCID

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Time-like linear dilaton backgrounds admit a classical solution that describes a closed folded string that is created at an instant. We refer to such strings as Instant Folded Strings (IFS). We study an exact worldsheet CFT description of an IFS that involves two vertex operators which describe two open string modes that propagate on a time-like FZZT-brane, which plays the role of a regulator to the IFS. We take advantage of this description to calculate the most basic quantity associated with IFSs - their production rate. Some implications of this calculation to stringy cosmology and black hole interior are briefly discussed.

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Instant Cosmology
hep-th 2024-12 conditional novelty 6.0 of 10

A cosmology sourced by instant folded strings produces slow-roll dark energy from the dilaton potential's slope, with NEC violation suppressed in expansion and amplified in contraction.

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