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  Spinning strings and integrable spin chains in the AdS/CFT correspondence

Plefka, J. (2005). Spinning strings and integrable spin chains in the AdS/CFT correspondence. Living Reviews in Relativity, 8: 9. Retrieved from http://relativity.livingreviews.org/Articles/lrr-2005-9/.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-4F45-8 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-4F46-6
Genre: Journal Article

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lrr-2005-9Color.pdf (Publisher version), 551KB
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Plefka, Jan1, Author
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1Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24014              

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 Abstract: In this introductory review we discuss dynamical tests of the AdS_5 ×S5 string/N = 4 Super Yang-Mills duality. After a brief introduction to AdS/CFT, we argue that semiclassical string energies yield information on the quantum spectrum of the string in the limit of large angular momenta on the S5. The energies of the folded and circular spinning string solutions rotating on a S3 within the S5 are derived, which yield all-loop predictions for the dual gauge theory scaling dimensions. These follow from the eigenvalues of the dilatation operator of N = 4 Super Yang-Mills in a minimal SU(2) subsector, and we display its reformulation in terms of a Heisenberg s = 1/2 spin chain along with the coordinate Bethe ansatz for its explicit diagonalization. In order to make contact to the spinning string energies, we then study the thermodynamic limit of the one-loop gauge theory Bethe equations and demonstrate the matching with the folded and closed string result at this loop order. Finally, the known gauge theory results at higher-loop orders are reviewed and the associated long-range spin chain Bethe ansatz is introduced, leading to an asymptotic all-loop conjecture for the gauge theory Bethe equations. This uncovers discrepancies at the three-loop order between gauge theory scaling dimensions and string theory energies and the implications of this are discussed. Along the way, we comment on further developments and generalizations of the subject and point to the relevant literature.

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Language(s): eng - English
 Dates: 2005
 Publication Status: Published in print
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Title: Living Reviews in Relativity
Source Genre: Journal
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Pages: - Volume / Issue: 8 Sequence Number: 9 Start / End Page: - Identifier: -