# Colloquia Archive 2013

### 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 ...

### 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 ...

### 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 many-body system. The first of ...

### The stability of stationary turbulent flows as a problem in non-equilibrium statistical mechanics—Roderick DEWAR

Variational principles of fluid turbulence offer an attractive alternative to numerical solution of the Navier-Stokes equation, especially for global climate studies. In this talk I'll discuss the conjecture of ...

### 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 ...

### 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 ...

### 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 ...

### 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 ...

### Current fluctuations in non-equilibrium 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 ...

### 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 ...

### 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 central-force springs can model systems as diverse as architectural structures, crystalline and amorphous solids, granular matter, and protein structures. The ...

### The structure of amplitudes in gauge theory—Ruth BRITTO

Observing new physics at hadron colliders requires a detailed description of multi-particle scattering events. It is not practical to evaluate Feynman diagrams directly for all significant processes. Moreover, adding all ...

### Random Matrices, Vicious Walkers and Yang-Mills 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 ...

### 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 ...

### 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 ...

### 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 cold-spots in the cosmic microwave background anisotropy, or the details ...

### 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 ...

### Quantum Quenches in One-Dimensional Many-Particle Systems—Fabian ESSLER

I consider the non-equilibrium time evolution after a "quantum quench": an isolated many-particle system is initially prepared in its ground state and at time t=0 a parameter such as ...