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Colloquia Archive 2013
This event is a Colloquium.

Particle Fever—David KAPLAN
I describe the analysis of the Standard Model of particle physics that has led a generation to believe that there is (accessible) physics beyond it. I also introduce the idea of the multiverse that has shaken that belief. Then I present the impact data from the Large Hadron Collider has ...
Higgs Centre Seminar Room, JCMB
This event is a Colloquium.

Studying the Higgs boson with the ATLAS experiment—Fabiola GIANOTTI
The present understanding of the properties of the recently discovered Higgs
boson is discussed, based on the most recent results from the ATLAS
experiment. These results include measurements of the mass, spin, production
mechanisms, and couplings to fermions and bosons, and are based in most cases
on the full data ...
Higgs Centre Seminar Room, JCMB
This event is a Colloquium.

Applying Tensor Network Techniques to Lattice Gauge Theories—Mari Carmen BANULS
The term Tensor Network States (TNS) encloses a number of families that
represent different ansatzes for the efficient description of the state of a
quantum manybody system. The first of these families, Matrix Product States
(MPS), lies at the basis of Density Matrix Renormalization Group methods,
which have become the ...
Higgs Centre Seminar Room, JCMB
This event is a Colloquium.

The stability of stationary turbulent flows as a problem in nonequilibrium statistical mechanics—Roderick DEWAR
Variational principles of fluid turbulence offer an attractive alternative to
numerical solution of the NavierStokes equation, especially for global
climate studies. In this talk I'll discuss the conjecture of maximum kinetic
energy dissipation and its application to turbulent channel flow and climate
systems, as well as its theoretical basis ...
Higgs Centre Seminar Room, JCMB
This event is a Colloquium.

Effective Lagrangian for the Higgs—Adam FALKOWSKI
I will summarize the status of the Higgs boson after the first run
of the LHC. The emphasis will be on interpreting the Higgs results as
constraints on physics beyond the Standard Model. I will discuss a general
effective Lagrangian that allows one to parametrize deviations of the Higgs
couplings ...
Higgs Centre Seminar Room, JCMB
This event is a Colloquium.

Testing General Relativity with Cosmology—Pedro FERREIRA
With the successes of observational cosmology, a new window has opened up on
to gravitational physics. By carefuly measuring the morphology and growth of
structure in the Universe it may be possible to constrain general relativity
on a completely new range of scales. It also allows us to explore a ...
CSEC Seminar Room, James Clerk Maxwell Building
This event is a Colloquium.

Soft matter in motion—Eric LAUGA
The cellular world is inhabited by a myriad of microorganisms able to self
propel, including many bacteria, spermatozoa, ciliates, and plankton. Here, we
focus on the biophysics of ciliary locomotion. Cilia are short slender
whiplike appendages (a few microns long, one tenth of a micron wide)
internally actuated by molecular ...
CSEC Seminar Room, James Clerk Maxwell Building
This event is a Colloquium.

Complex extension of quantum mechanics—Carl BENDER
The average quantum physicist on the street would say that a quantum
mechanical Hamiltonian must be Dirac Hermitian (invariant under combined
matrix transposition and complex conjugation) in order to guarantee that the
energy eigenvalues are real and that time evolution is unitary. However, the
Hamiltonian H=p^2+ix^3 ...
CSEC Seminar Room, James Clerk Maxwell Building
This event is a Colloquium.

Current fluctuations in nonequilibrium systems—Bernard DERRIDA
This talk will review a series of results obtained recently on the
fluctuations of current in diffusive systems for several geometries: steady
state obtained by contact with two reservoirs or two heat baths, system at
equilibrium on a ring geometry, two systems at unequal temperatures which are
connected at time ...
Lecture Theatre B, James Clerk Maxwell Building
This event is a Colloquium.

Cosmological Results from Planck 2013 and Beyond—Martin WHITE
The European Space Agency's Planck satellite was launched on 14 May 2009, and
has been surveying the sky stably and continuously since 13 August 2009. In
March of 2013, ESA and the Planck Collaboration released to the public a first
complete set data products. I will review some of ...
CSEC Lecture Theatre, James Clerk Maxwell Building
This event is a Colloquium.

Rigidity, Zero Modes, States of Self Stress, Topological States, and Surface Phonons in Periodic Networks at or near near their Instability Limit—Tom LUBENSKY
"Frames" consisting of nodes connected pairwise by rigid rods or centralforce
springs can model systems as diverse as architectural structures, crystalline
and amorphous solids, granular matter, and protein structures. The rigidity
of these networks depends on their average coordination number z: If z is
small enough, the system has internal ...
CSEC Lecture Theatre, James Clerk Maxwell Building
This event is a Colloquium.

The structure of amplitudes in gauge theory—Ruth BRITTO
Observing new physics at hadron colliders requires a detailed description of
multiparticle scattering events. It is not practical to evaluate Feynman
diagrams directly for all significant processes. Moreover, adding all diagrams
reveals many cancellations: scattering amplitudes in gauge theories such as
QCD take remarkably simple forms. This simplicity is a ...
CSEC Seminar Room, James Clerk Maxwell Building
This event is a Colloquium.

Random Matrices, Vicious Walkers and YangMills Gauge Theory—Satya MAJUMDAR
I will discuss three apparently unrelated subjects: (i) Wishart random
matrices that appear in statistics and data analysis; (ii) Vicious Random
Walkers model in statistical mechanics introduced by de Gennes and Fisher;
(iii) pure YangMills gauge theory in two dimensions on a sphere. The goal of
this talk is to ...
Lecture Theatre B, James Clerk Maxwell Building
This event is a Colloquium.

Modelling dark energy  from a cosmological constant to quintessence to modified theories of gravity—Ed COPELAND
I briefly review models of dark energy. These include models of a
cosmological constant including those arising in string theory, and dynamical
models where a scalar field may be responsible for the observed late time
acceleration, through to the possibility that we are not fully in control of
the gravity ...
CSEC Seminar Room, James Clerk Maxwell Building
This event is a Colloquium.

Motile Matter—Sriram RAMASWAMY
Active Matter is composed of particles each supplied with energy which it
dissipates, often resulting in systematic movement. Examples include living
organisms, their motile constituents and some surprising mechanical and
chemical analogues. These strongly driven systems offer a new arena in which
to study the interplay of broken symmetry, conservation ...
Lecture Theatre B, James Clerk Maxwell Building
This event is a Colloquium.

Searching for new physics in the primordial density perturbation—David SEERY
Over the last decade, considerable effort has been expended to understand how
subtle correlations in the pattern of hot and coldspots in the cosmic
microwave background anisotropy, or the details of galaxy clustering, can
teach us about physics at very high energies. I will review this effort and
explain how ...
CSEC Seminar Room, James Clerk Maxwell Building
This event is a Colloquium.

Perturbation theory to all orders for collider physics—Eric LAENEN
Predictions for scattering processes at particle colliders are done using
perturbation theory, mostly using Feynman diagrams. Increasing precision
requires increasing the order to which one computes, but sheer complexity puts
a block on that road. Even worse, the corrections in many situations are too
large for comfort. In this talk ...
CSEC Seminar Room, James Clerk Maxwell Building
This event is a Colloquium.

Quantum Quenches in OneDimensional ManyParticle Systems—Fabian ESSLER
I consider the nonequilibrium time evolution after a "quantum quench": an
isolated manyparticle system is initially prepared in its ground state and at
time t=0 a parameter such as a magnetic field or an interaction strength is
changed suddenly. I discuss realisations of such effects in systems of ultra ...
CSEC Seminar Room, James Clerk Maxwell Building
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