Tuesday | Wednesday | Thursday | Friday | Saturday |

Ortvay lecture hall 0.81 | Ortvay lecture hall 0.81 | Ortvay lecture hall 0.81 | ||

Arrival | 08:00-08:55 Registration | Departure | ||

08:55 Opening | ||||

09:00 Nepomechie | 09:00 Gherghetta | 09:00 Korchemsky | ||

09:45 Arutyunov | 09:45 Piai | 09:45 Satoh | ||

10:30 Coffee | 10:30 Coffee | 10:30 Coffee | ||

11:00 Balog | 11:00 Sugimoto | 11:00 Erdmenger | ||

11:45 Suzuki | 11:45 Domokos | 11:45 Ammon | ||

12:15 Lukowski | 12:30 Schmitt | 12:15 Salvio | ||

12:45 Lunch | 13:00 Lunch | 12:45 Lunch | ||

15:00 Jevicki | 15:00 Pomarol | 15:00 Janik | ||

15:45 Rey | 15:45 Ewerz | 15:45 Ahn | ||

16:30 Coffee | 16:30 Coffee | 16:30 Coffee | ||

17:00 Nilsson | 17:00 Giannuzzi | 17:00 J. Park | ||

17:45 Bak | 17:30 Nicotri | 17:45 Mezei | ||

18:30 Regelskis | 18:00 Seo | 18:15 Ch. Park | ||

Registration, room 7.20 | 18:30 Patrushev | 18:45 Closing | ||

17:00 Welcome drink | 20:00 Conference dinner | 19:00 Night in the Museum | Departure |

Changrim Ahn, (Seoul, EWHA)

Title: 3-point functions of finite-size Giant
Magnons

Abstract: We report semiclassical 3-point correlation functions of a
light dilaton mode and two (dyonic) giant magnon string states with
finite-size J both on R x S^3 and on gamma-deformed Lunin-Maldacena
background. We show consistency of our result by relating them to
conformal dimensions or E-J.

Martin Ammon, (UCLA)

Title: Gauge/Gravity Duality applied to Condensed
matter systems

Abstract: In this talk I will review recent progress in gauge/gravity duality
towards the description of strongly coupled systems near quantum critical
points. I will focus on an explicit, string theory inspired realization of
gauge/gravity dualities in terms of D-branes. In these models it is possible to
find superconducting instabilites as well as (non)-Fermi liquids.
I will comment on new universal behavior and compare to effects at weak
coupling.

Gleb Arutyunov, (Utrecht Univ.)

Title: The mirror TBA

Abstract: I review some aspects concerning the construction of the Thermodynamic
Bethe Ansatz equations describing the spectrum of the AdS_5 x S^5 superstring.

Dongsu Bak, (Seoul Univ.)

Title: Phase Transitions in the U(1) Charged
Sector of ABJM Theory

Abstract: We consider the U(1) charged sector of ABJM theory at finite
temperature, which corresponds to the Reissner-Nordstrom AdS black hole in the
dual type IIA supergravity description. Including back-reaction to the bulk
geometry,
We shall show that phase transitions occur to a broken phase where SU(4)
R-symmetry of the field theory is broken spontaneously by the condensation of
dimension one or two operators. We demonstrate both numerically and analytically
that the relevant critical exponents for the dimension one operator agree
precisely with those of mean field theory in the strongly coupled regime of the
large N planar limit.

János Balog, (Budapest, KFKI)

Title: Mirror TBA equations from Y-system and
discontinuity relations

Abstract: Using the recently proposed set of discontinuity relations we
translate the AdS/CFT Y-system to TBA integral equations and quantization
conditions for a large subset of excited states from the sl(2) sector of the
$AdS_5 \\times S^5$ string sigma-model. Our derivation provides an analytic
proof of the fact that the exact Bethe equations reduce to the
Beisert-Staudacher equations in the asymptotic limit. We also construct the
corresponding T-system and show that in the language of T-functions the energy
formula reduces to a single term which depends on a single T-function.

Sophia K. Domokos, (Weizmann Inst.)

Title: Extending the framework of AdS/QCD: new
mesons and interactions

Abstract: Though existing models of AdS/QCD have quite successfully described
certain states of the low-lying meson spectrum, they have largely neglected
b1-type axial vector mesons, whose masses are of the same order as the
much-studied rho and a1. I will describe a natural extension of the \"hard
wall\" model of AdS/QCD, which not only incorporates these ignored states, but
also provides an additional tower of rho-like mesons which improves agreement
with the masses of radial rho-like excitations.

Johanna Erdmenger, (Munich, MPI)

Title: Holographic p-wave superconductors

Abstract: Recently, considerable progress has been achieved in using
gauge/gravity duality for describing strongly coupled systems of relevance for
condensed matter physics. In this context, I consider both top-down approaches
and bottom-up approaches to holographic superconductors where the order
parameter has p-wave symmetry. In the top-down approaches, the holographic
superconductors are realized in a probe brane construction involving a probe of
two D-branes at finite isospin density. The dual field theory is known
explicitly. We obtain the thermodynamics and the Fermi surface for these
systems. Moreover, we consider bottom-up approaches for p-wave superconductors
in which we study the back-reaction of the required SU(2) gauge field on the
geometry. We find the phase diagram. A particularly
interesting feature of this model is that the shear viscosity over entropy ratio
displays non-universal behaviour, it is temperature-dependent at
leading order in N and lambda.

Carlo Ewerz, (Heidelberg)

Title: Screening in Strongly Coupled Plasmas from
AdS/CFT:

Abstract: We use the gauge/gravity correspondence to study the screening of a
heavy quark-antiquark pair in various strongly coupled plasmas.
We consider the dependence of the screening distance
on the velocity and the orientation of the pair in the plasma.
The value of the screening distance in N=4$ SYM
is found to be a minimum in a large class of theories.
We further discuss the behaviour of the running coupling in these
theories.

Tony Gherghetta, (Melbourne Univ.)

Title: Generating a Little Hierarchy from
Accidental SUSY

Abstract: An emergent or accidental supersymmetry is used to address the little
hierarchy problem in Randall-Sundrum models by naturally generating a hierarchy
between the IR scale and the electroweak scale. Supersymmetry is broken on the
UV brane which triggers the stabilization of the warped extra dimension at an IR
scale of order 10 TeV. This causes the first two sparticle generations to
decouple, thereby avoiding the supersymmetric flavour and CP problems, while an
accidental R-symmetry protects the gaugino mass. The resulting low-energy
sparticle spectrum consists of stops, gauginos and Higgsinos which are
sufficient to stabilize the little hierarchy between the IR scale and the
electroweak scale. Introducing a singlet Higgs field on the IR brane,
ameliorates the supersymmetric little hierarchy problem, and allows Higgs masses
up to 300 GeV.

Floriana Giannuzzi, (Bari)

Title: Spectral functions at finite temperature and density in the Soft Wall
model of Holographic QCD

Abstract: The spectral functions of vector and scalar mesons are computed in the
Soft Wall model of Holographic QCD at different temperatures and densities in
the AdS space with a black hole. The behaviour of the spectra is shown in the
parameter space.

Romuald Janik, (Krakow, Jagiellonian Univ.)

Title: Strongly coupled plasma - from nonequillibrium to hydrodynamics through
AdS/CFT

Abstract: In this talk I review the recent work on the application of
the AdS/CFT correspondence to the study of the evolution of boost
invariant plasma starting from various initial conditions.
The main goal of this study is to isolate the key features
of the transition from nonequilibrium to hydrodynamic behaviour.
This is a direct N=4 SYM analog of the early thermalization
puzzle of quark-gluon plasma produced in relativistic heavy-ion
collisions.

Antal Jevicki, (Brown Univ.)

Title: Higher Spin ADS Gravity from Conformal Field Theory : A
Constructive Approach

Abstract: We plan to review recent work on the Higher Spin Gravity /Vector Model
CFT Correspondence. A constructive approach relating Higher Spin AdS fields to
fields of the Large N vector model will be presented with emphasis on
reconstruction of AdS space-time and of bulk gravity degrees of freedom.
The holographic RG method will also be commented upon.

Gregory Korchemsky, (Paris, Saclay, IPhT)

Title: Dualities for scattering amplitudes in maximally supersymmetric Yang-Mills theory

Abstract: I will review a recent progress in computing scattering amplitudes in N=4 SYM theory
and explain the recently found duality between gluon scattering amplitudes and
correlation functions of half-BPS protected operators in the limit where the positions of
the adjacent operators become light-like separated.

Tomasz Lukowski, (Berlin)

Title: Spin chains in the AdS/CFT correspondence

Abstract: I will present a novel construction of Baxter operators for spin
chains with given representation in the quantum space. As a special case It
furnishes to find an alternative solution of the one-loop spectral problem of
the AdS/CFT correspondence. This construction gives also hope for better
understanding of the full spectrum of this theory.

Márk Mezei, (MIT)

Title: Finite density dynamics from holography

Abstract: Holography provides an efficient new way of studying strongly
interacting systems at finite density. In the dual gravity setup we generically
encounter an AdS$_2$ factor, which we interpret as an intermediate energy phase,
a strongly coupled liquid with nontrivial scaling behavior in the time
direction. We aim to describe what kind of phases and phase transitions
holographic systems exhibit from the viewpoint of this liquid phase. Various
instabilities are identified. For example in one of our exotic phase transitions
we find a finite susceptibility, but an infinite correlation length at the
critical point. From these studies we hope to get inspiration on how to get a
handle on hard problems in real condensed matter systems.

Rafael Nepomechie, (Miami)

Title: Integrability in twisted AdS/CFT

Abstract: There is overwhelming evidence that AdS5/CFT4 is integrable. We review
some recent results suggesting that integrability persists in a deformation of
the theory corresponding to twists in the worldsheet S-matrix and boundary
conditions.

Stefano Nicotri, (Bari)

Title: Getting hints on the QCD phase diagram through bottom-up holography

Abstract: We investigate the deconfinement transition in QCD-like theories at
finite temperature and chemical potential by studying the heavy quark-antiquark
free energy through bottom-up holographic methods.
The resulting deconfinement line in the \\mu-T plane is in agreement with
phenomenology, and the critical value of the chemical potential is extracted.

Bengt. E.W. Nilsson, (Chalmers)

Title: Topologically gauged BLG/ABJM theory and
chiral gravity

Abstract: We discuss recent developments in AdS/CFT concerning the possibility of
introducing boundary conditions that lead to boundary theories with dynamical gravity. We then
construct BLG/ABJM theories with gauged global symmetries that should arise in this
generalized AdS/CFT context.

Chanyong Park, (Seoul)

Title: Correlation Functions of the Solitonic
String

Abstract: We investigate the two- and three-point correlation functions of the
solitonic string moving in the Poincare $AdS$ and three-dimensional sphere.
After calculating the three-point correlation function between two heavy
operators corresponding to the magnon or spike and one marginal scalar operator,
we show that the coupling between those operators in string theory is exactly
the same as one obtained by the RG analysis in the gauge theory.

Jaemo Park, (Pohang)

Title: Probing dualities by index computation

Abstract: We explore the various dualities using the index computation.
We work out the index of 3-d theories related by Seiberg-like dualities
and find perfect agreements. We also work out the index of 3-d mirror pairs
with N=4 supersymmetry and the corresponding N=4 Chern-Simons matter theories
and find prefect agreements. Finally we work out the superconformal index for
candidate
AdS4/CFT3 dual pairs with N=2 supersymmetry.

Alexander Patrushev, (Ontario)

Title: Exotic black holes: correlated stability conjecture,
Eling-Oz formula for bulk viscosity

Abstract: We analyze black hole solutions of the model with scalar hair proposed
by Buchel and Pagnutti. First, this model appears to be the counterexample for
correlated stability conjecture connecting thermodynamic and classical
(in)stabilities of black branes. Second, we discuss dual hydrodynamic properties
and show that Elling-OZ formula for bulk viscosity is valid for all the
temperatures.

Maurizio Piai, (Swansea Univ.)

Title: Walking dynamics from gauge-gravity
dualities.

Abstract: Dynamical electroweak symmetry breaking will be tested at the Large
Hadron Collider. Gauge-gravity dualities offer an ideal tool for the study of
this scenario, in which the underlying dynamics is strongly coupled and very
different from QCD. Some specific models, built within Type IIB string theory
with backgrounds related to the conifold, exhibit the feature of a light scalar
particle in the spectrum, which might mimic many of the signatures of the
Standard Model Higgs.

Alex Pomarol, (Barcelona, UAB)

Title: AdS/CFT and compositeness in the SM

Abstract: We use the AdS/CFT correspondence to study the implications of
compositeness in the particle spectrum of the SM
and how this could be tested at the LHC.

Vidas Regelskis, (York)

Title: Integrable boundaries in AdS/CFT

Abstract:
The recent progress in solving the planar limit of AdS/CFT was
accelerated a lot by the underlying integrability. The striking
success in finding the scattering S-matrices and reflection K-matrices
from various boundaries was achieved due to the underlying
centrally-extended su(2|2) algebra and it's Yangian extension.
In this talk I shall focus on the Yangian symmetry related to the
reflection from the D3 and D5 branes. The reflection depends crucially
on the orientation of the brane inside the AdS_5 x S^5 space and the
choice of vacuum. Some cases allow a `twisted boundary Yangian'
structure which is a co-ideal subalgebra of the usual Yangian of the
bulk S-matrix. In particular, I will consider the twisted Yangian of the
Y=0 D3 brane and the achiral twisted Yangian of D5 brane.

Soo-Jong Rey, (Seoul Nat. Univ.)

Title: Nonlinear W(infinity) Symmetry in 3d Higher
Spin AdS/CFT

Abstract: In this talk, I present new results on AdS/CFT for 3d higher spin
gauge theory, which is believed to describe tensionless limit of string theory.
By analyzing asymptotic symmetry in the bulk, we argue that the boundary CFT
must have W(infinity) symmetry. The symmetry algebra has a classical central
charge c = 6k = L/3G. I will discuss implications of this to the boundary CFT,
especially, for microstates of black holes. I will also generalize it to
maximally extended supersymmetric setup and emphasize some peculiarities
compared to bosonic case. I will also discuss
applications of this new findings to AdS/CMT and AdS/QCD.

Alberto Salvio, (Pisa)

Title: The Little-Parks Effect and Quantum Hair on (Holographic) Superconductors

Abstract: Superconductors in a large-radius cylindrical geometry threaded by a
magnetic flux display the so-called Little-Parks effect - a periodicity in the
flux with period hc/2e. The Aharonov-Bohm effect, instead, is hc/e-periodic
and it can uplift the degeneracy of the Little-Parks sub-periods
for small enough cylinder radii. In Holographic Superconductors, the
Little-Parks degeneracy and its uplifting
are simply understood as the response to a Quantum Hair given by a magnetic
discrete gauge charge. The uplifting is suppressed in the deconfining (Black
Hole) phase and unsuppressed in the confining (AdS Soliton) phase as a result of
a large N (classical) no-hair theorem. It will also be discussed a
Ginzburg-Landau description to the uplifting of the Little-Parks degeneracy.

Yuji Satoh, (Tsukuba)

Title: g-functions and gluon scattering
amplitudes at strong coupling

Abstract: We discuss gluon scattering amplitudes of N=4 SYM at strong coupling
by using the thermodynamic Bethe ansatz equations/Y-system and conformal
perturbation theory. An interesting relation between Y-functions and g-functions
(boundary entropy) enables us to derive analytic expansions of the amplitudes
around kinematic points of equal cross-ratios of external momenta. We obtain the
expansions explicitly for the amplitudes corresponding to the minimal surfaces
in AdS_3, and find that appropriately rescaled remainder functions are very
similar to those at weak coupling.

Andreas Schmitt, (Vienna)

Title: Inverse magnetic catalysis in dense
holographic matter

Abstract: We study the chiral phase transition in a magnetic field at finite
temperature and chemical potential within the Sakai-Sugimoto model, a
holographic top-down approach to (large-N_c) QCD. We consider the limit of a
small separation of the flavor D8-branes, which corresponds to a dual field
theory comparable to a Nambu-Jona Lasinio (NJL) model. Mapping out the surface
of the chiral phase transition in the parameter space of magnetic field
strength, quark chemical potential, and temperature, we find that for small
temperatures the addition of a magnetic field decreases the critical chemical
potential for chiral symmetry restoration - in contrast to the case of vanishing
chemical potential where, in accordance with the familiar phenomenon of magnetic
catalysis, the magnetic field favors the chirally broken phase. This ``inverse
magnetic catalysis\'\' (IMC) appears to be associated with a previously found
magnetic phase transition within the chirally symmetric phase that shows an
intriguing similarity to a transition into the lowest Landau level.
We estimate IMC to persist up to $10^{19}\\, {\\rm G}$ at low temperatures.

Yunseok Seo, (Seoul)

Title: Baryons and mesons in dense system

Abstract: The behavior of hadrons at finte density is very hard to understand
even in lattice QCD. To study density or chemical potential dependence of
hadrons, we construct a simple D-brane model. From this model, we investigate
several properties of hadrons in dense system.

Shigeki Sugimoto, (Tokyo, IPMU)

Title: Holographic Description of Hadrons from
String Theory

Abstract: I will give an overview of holographic QCD, which is an attempt to
apply the idea of gauge/string duality to QCD and hadron physics. In particular,
I will discuss that various mesons found in the experiment are described as open
string states.

Ryo Suzuki, (Utrecht)

Title: Hybrid nonlinear integral equations for AdS_5 x S^5

Abstract: The exact quantum spectrum of string states on AdS_5 x S^5 is expected
to be given by Thermodynamic Bethe Ansatz (TBA) equation. However,
it is not easy to analyze TBA because it involves infinitely many Y-functions.
In this talk, I will explain how to simplify TBA for superstring on AdS_5 x S^5
via the decomposition of Y-functions into constituents; like mesons into quarks.
This method is based on A1 symmetry, integrability and analyticity, and thus
applicable to other integrable models.