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Search: authors:"Konstantin Zarembo"

10 papers found.
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Quantum string test of nonconformal holography

We compute Lüscher corrections to the effective string tension in the PilchWarner background, holographically dual to \( \mathcal{N} \) = 2∗ supersymmetric Yang-Mills theory. The same quantity can be calculated directly from field theory by solving the localization matrix model at large-N . We find complete agreement between the field-theory predictions and explicit string-theory...

Holographic Wilson loops in symmetric representations in \( \mathcal{N} = {2}^{\ast } \) super-Yang-Mills theory

We construct the D3-brane solution in the holographic dual of the \( \mathcal{N} = {2}^{\ast } \) theory that describes Wilson lines in symmetric representations of the gauge group. The results perfectly agree with the direct field-theory predictions based on localization.

Higher rank Wilson loops in N = 2∗ super-Yang-Mills theory

The \( \mathcal{N}={2}^{\ast } \) Super-Yang-Mills theory (SYM*) undergoes an infinite sequence of large-N quantum phase transitions. We compute expectation values of Wilson loops in k-symmetric and antisymmetric representations of the SU(N ) gauge group in this theory and show that the same phenomenon that causes the phase transitions at finite coupling leads to a non-analytic...

Quantum phase transitions in mass-deformed ABJM matrix model

When mass-deformed ABJM theory is considered on S 3, the partition function of the theory localises, and is given by a matrix model. At large N, we solve this model in the decompactification limit, where the radius of the three-sphere is taken to infinity. In this limit, the theory exhibits a rich phase structure with an infinite number of third-order quantum phase transitions...

One-point functions in defect CFT and integrability

We calculate planar tree level one-point functions of non-protected operators in the defect conformal field theory dual to the D3-D5 brane system with k units of the world volume flux. Working in the operator basis of Bethe eigenstates of the Heisenberg XXX 1/2 spin chain we express the one-point functions as overlaps of these eigenstates with a matrix product state. For k = 2 we...

One-point functions in AdS/dCFT from matrix product states

One-point functions of certain non-protected scalar operators in the defect CFT dual to the D3-D5 probe brane system with k units of world volume flux can be expressed as overlaps between Bethe eigenstates of the Heisenberg spin chain and a matrix product state. We present a closed expression of determinant form for these one-point functions, valid for any value of k. The...

Holographic dual of the Eguchi-Kawai mechanism

The holographic dual of \( \mathcal{N} \) = 2*, D = 4 supersymmetric Yang-Mills theory has many features common to 5d CFT. We interpret this as a manifestation of Eguchi-Kawai mechanism.

\( \mathcal{N}={2}^{\ast } \) super-Yang-Mills theory at strong coupling

The planar \( \mathcal{N}={2}^{\ast } \) Super-Yang-Mills (SYM) theory is solved at large ’t Hooft coupling using localization on S 4. The solution permits detailed investigation of the resonance phenomena responsible for quantum phase transitions in infinite volume, and leads to quantitative predictions for the semiclassical string dual of the \( \mathcal{N}={2}^{\ast } \) theory.

Classical and quantum temperature fluctuations via holography

We study local temperature fluctuations in a 2+1 dimensional CFT on the sphere, dual to a black hole in asymptotically AdS spacetime. The fluctuation spectrum is governed by the lowest-lying hydrodynamic modes of the system whose frequency and damping rate determine whether temperature fluctuations are thermal or quantum. We calculate numerically the corresponding quasinormal...