Colloquia Archive 2014

Dec122014

New Horizons in Quantum CriticalityAndrew GREEN

The ideas of quantum criticality have proven a powerful unifying framework for a broad range of strongly correlated quantum systems. Experimental probes with ever greater sensitivity have resolved subtle new ...

Nov282014

Rotation and Convection in the SunSteven BALBUS

Helioseismology techniques have revealed the details of the Sun's internal rotation with remarkable precision. The radiative zone is nearly uniformly rotating, whereas the convective zone differential rotation is generally ...

Nov212014

The Copenhagen Interpretation Born Again Tim HOLLOWOOD

An approach to the Copenhagen interpretation of quantum mechanics is developed which makes the Heisenberg cut between the deterministic microscopic quantum world and the stochastic macroscopic world explicit. The stochastic ...

Oct312014

Complex flows of complex fluidsSuzanne FIELDING

After a pedagogical introduction to the rheology (deformation and flow properties) of complex fluids and soft materials, we discuss recent research concerning viscoelastic instabilities in these materials, where an initially ...

Oct032014

The knotted strands of lifeEnzo ORLANDINI

Knots are part of our everyday life. In some cases they can be very useful as in climbing or sailing whereas in some others they can be a nuisance, as ...

Aug082014

Gravitational redshifts in cosmologyNick KAISER

Wojtak, Hansen and Hjorth (Nature, 2011) have measured the long- predicted gravitational redshifts in galaxy clusters using Sloan Digital Sky Survey data. The effect is very small, corresponding to a ...

Jun102014

The Challenge of Galaxy FormationJoseph SILK

The origin of the galaxies represents an important focus of current cosmological research, both observational and theoretical. Its resolution involves a comprehensive understanding of star formation, galaxy dynamics, supermassive black ...

Apr252014

BICEP2 and inflationary gravitational wavesAndrew LIDDLE

The BICEP2 collaboration recently announced detection of polarization patterns in the cosmic microwave background characteristic of primordial gravitational waves. This talk will describe the context and main results from BICEP2 ...

Mar242014

The Sounds of Broken Symmetry in Superfluid HeliumJim SAULS

The concepts of 'spontaneous symmetry breaking', 'generalized rigidity', and 'collective modes' play an important role in theoretical physics. Indeed much of the phenomenology of condensed matter can be understood in ...

Mar142014

Old and New Results from the CMBAndrew JAFFE

In the first part of this colloquium, I will assume that you've all seen quite a few talks on the recent Planck results, and so concentrate on some of ...

Feb112014

EntanglementJosé LATORRE

Entanglement is arguably the essence of Quantum Mechanics. It characterizes quantum correlation in states of condensed matter and quantum field theories. It provides the resources for quantum communication in the ...