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Department of Mathematical Sciences

Seminar Archives

On this page you can find information about seminars in this and previous academic years, where available on the database.

Maths HEP supplementary seminars: Massless Lüscher Terms and the Limitations of the AdS3 Asymptotic Bethe Ansatz

Presented by Michael Abbott, University of Cape Town

28 April 2016 15:00 in CM221

We recently showed that the Bethe equations for AdS_3 integrability describe the spectrum of a much smaller sector than was the case for AdS_5/CFT_4. The reason is that wrapping corrections enter much earlier than before, thanks to the presence of massless modes. This explains a mismatch that was seen in one of the classic tests of AdS/CFT integrability, namely the study of circular spinning strings from which Hernandez & Lopez deduced the one-loop dressing phase for AdS_5. My talk will start by reviewing this test, then translate to AdS_3 to see the mismatch, and finish by explaining what we now understand about the origin of this. (Reference: )

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