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Boris Runov (Australian National University)
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Exact vacuum energy of Bukhvostov-Lipatov model from the ODE/IM correspondence
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The Bukhvostov-Lipatov model was originally proposed as a way to
compute the contribution of instantons to the partition function of the
O(3) NLSM. The integrable structure of the Bukhovstov-Lipatov model is
discussed. The relation between this integrable structure and the solutions
of classical sinh-Gordon equation is explored and used to constuct the
vacuum state and to compute exactly the vacuum energy of the model