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[somogyi <somogyi.gabor AT wigner.hu>]

Wigner FK RMI Elméleti Osztály Szemináriuma
Tisztelettel meghívjuk


                  Anton Prybitok
                  (Humboldt University, Berlin)


"Ground state energy of twisted AdS3 × S3 × T4 superstring and the TBA"


     címmel tartandó szemináriumára.


Kivonat:



In the present work we address the Thermodynamic Bethe Ansatz and ground 
state energy of the AdS3 × S3 × T4 model from the associated mirror 
superstring model in the pure RR background. Independently, we show 
complete consistency with wrapping interaction formalism and derive 
generalised Lüscher expression for GSE. We prove that the underlying 
mirror Y-system becomes solvable in various parametric regimes of the 
lightcone superstring theory. Moreover the contribution of the gapless 
worldsheet modes coming from the T4 can be computed exactly. Next we 
implement the lightcone AdS3 × S3 × T4 superstring sigma model with 
twisted boundary conditions on the fields. It then allows us to find the 
ground state energy in the semi-classical approximation, where string 
tension h and lightcone momentum L are infinite and the ratio is fixed. 
Comparison of semi-classical results demonstrates that there is a full 
agreement with the computation from AdS3 TBA. We also emphasize the 
massless factor discrepancy with respect to the initial conjecture 
arXiv:2112.08898 and show that it is related to the Y-functions 
describing massless excitations. We also make a mixed flux proposal from 
the TBA and find complete correspondence with our computation from the 
AdS3 × S3 × S3 × S1 lightcone superstring.




Helye: Wigner FK RMI III. ép. Tanácsterem
Ideje: 2023. augusztus 21 hétfő  d.u. 14 óra (SZOKÁSOSTÓL ELTÉRŐ 
IDŐPONT)

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