Open Spin Chain and Open Spinning String
Bin Chen, Xiao-Jun Wang, Yong-Shi Wu

TL;DR
This paper explores open spinning strings and their duals in SYM, discovering new folded solutions and confirming their energy relations with string theory through integrable spin chain analysis.
Contribution
It introduces a new class of folded open spinning strings and verifies universal relations between open and closed strings using Bethe ansatz.
Findings
Good agreement between SYM spin chain energies and string theory predictions
Discovery of a new class of folded open spinning strings
Verification of universal relations between open and closed strings
Abstract
In this letter, we study the open spinning strings and their SYM duals. A new class of folded open spinning strings is found. At planar one-loop level in SYM, by solving the thermodynamic limit of the Bethe ansatz equations for an integrable open spin chain, we find good agreement with string theory predictions for energies of both circular and folded two-spin solutions. A universal relation between the open and closed spinning strings is verified in the spin chain approach.
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