Massless modes in the AdS3 x S3 x T4 quantum spectral curve are shown to emerge as zeros on the branch cut, yielding Bethe equations and uniquely constrained dressing phases.
Dressing phases of AdS3/CFT2
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abstract
We determine the all-loop dressing phases of the AdS3/CFT2 integrable system related to type IIB string theory on AdS3 x S3 x T4 by solving the recently found crossing relations and studying their singularity structure. The two resulting phases present a novel structure with respect to the ones appearing in AdS5/CFT4 and AdS4/CFT3. In the strongly-coupled regime, their leading order reduces to the universal Arutyunov-Frolov-Staudacher phase as expected. We also compute their sub-leading order and compare it with recent one-loop perturbative results, and comment on their weak-coupling expansion.
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Demystifying the Massless Sector in AdS_3 Quantum Spectral Curve
Massless modes in the AdS3 x S3 x T4 quantum spectral curve are shown to emerge as zeros on the branch cut, yielding Bethe equations and uniquely constrained dressing phases.