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Analysis Seminar
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                                             Dublin Area Theoretical Physics Colloquium

The colloquium is organized by the School of Mathematics and held each Monday at 4.00 PM in the
Synge Lecture Theatre of the Hamilton Building.

Date Speaker  Affiliation
Title (Abstracts below) Notes
Michaelmas term:
Sep 30
Poul Henrik Damgaard
NBIA, Copenhagen
Lattice Simulations of N=4 Super Yang-Mills Theory

Oct 7 John Bulava
Hadron scattering phase shifts and resonance properties using Lattice QCD

Oct 14
Tomasz Korzec

Simulating the All-Order Strong Coupling Expansion: Ising Gauge Theory

Oct 21
Christian Brynes
Inflation after the Planck satellite

Oct 29
John Schwarz
Caltech N=4 SYM on the Coulomb Branch
Special Seminar
Nov 11
Dymtro Volin
Quantum spectral curve for AdS/CFT spectrum

Nov 12
Andrea Shindler
B-physics from lattice QCD ... with a twist
Special Seminar
Nov 18
Christof Gattringer

Nov 25
Sylvain Ribault

Dec 2
Nick Dorey

Hillary Term:
Jan 20

Jan 27

Feb 3

Feb 10

Feb 17

Mar 3

Mar 10

Mar 24


Date: Sep. 30th
Speaker:Poul Henrik Damgaard
Title: Lattice Simulations of N=4 Super Yang-Mills Theory

I will discuss on-going work to simulate N=4 supersymmetric lattice
gauge theory with an exactly preserved supersymmetry. The construction
is based on what in continuum language is known as topological twisting.
This provides the first example of a non-trivial four-dimensional
non-Abelian lattice gauge theory that is, apparently, conformal at
all bare couplings.

Date: Oct. 7th
Speaker: John Bulava
Title: Hadron scattering phase shifts and resonance properties using Lattice QCD

The last few years have seen significant improvement in
calculations of the finite-volume spectrum of QCD using
lattice field theory simulations. This spectrum contains a
wealth of information about hadron scattering phase shifts
and resonance properties. I will review the recent progress
in this field and highlight several benchmark calculations.
However, in order to make quantitative predictions, the
continuum limit must be taken. Current efforts toward
proceeding to smaller lattice spacings will also be

Date: Oct. 14th
Speaker: Tomasz Korzec
Title: Simulating the All-Order Strong Coupling Expansion: Ising Gauge Theory

Abelian lattice gauge theories are exactly equivalent to certaini
random surface models.Based on this equivalence, a novel simulation
technique is presented. It allows one to estimate Polyakov line
correlation functions precisely with relative errors that do not
increase with the separation of the two lines. Other observables
that are difficult to measure in the original formulation, like
the excess free energy due to twisted boundary conditions, become
easily accessible.

Date: Oct. 21st
Speaker: Christian Brynes
Title: Inflation after the Planck satellite

I will summarise our knowledge of inflation in light of the first
major data release from the Planck satellite this year. The satellite
has made the most accurate ever observations of the cosmic microwave
background temperature (CMB), which is likely to remain the
"state-of-the-art" for perhaps a decade. The inflationary paradigm
has been subjected to its sharpest test yet and remains an excellent
fit to the data. However certain classes of models are now either under
pressure or ruled out. Particular attention is paid to the constraints
on non-linear perturbations, which would give rise to non-Gaussian
perturbations of temperature perturbations.
In the second part of the talk I will focus on how the very small scale
perturbations could be measured. They are too small to be seen in the CMB
and currently largely unconstrained. Possibilities include searching for
primordial black holes and gravitational waves.

Date: Nov. 11th
Speaker: Dymtro Volin
Title: Quantum spectral curve for AdS/CFT spectrum

The AdS/CFT spectral problem, i.e. computation of conformal dimensions
in planar N=4 SYM, was a hot topic during the last decade, with more
than thousand publications devoted to it. Though it was formally solved
by TBA and more recently simplified by FiNLIE, the solution was never
formulated in a clear and lucid style. In this talk I will present our
new advancement which unveil the whole beauty of the AdS/CFT spectrum:
it is described by a "quantum spectral curve" -- matrix Riemann-Hilbert
equations on a few Q-functions. A given state in the spectrum is encoded
into an asymptotics at infinity and into a solution of the exact Bethe
equations which, in the spirit of functional Bethe Ansatz, are nothing
but the regularity conditions on the Q-functions. During the talk I will
also demonstrate the efficiency of the new approach by computing the
Konishi anomalous dimension up to 8 loops in real time using a single CPU.

Date: Nov. 18th


Current organizers:

Dr. John Bulava
Dr. Tristan McLoughlin
Dr. Dymtro Volin