Random matrices are ubiquitous in modern theoretical physics and provide insights on a wealth of phenomena, from the spectra of heavy nuclei to the theory of strong interactions or random two dimensional surfaces. The backbone of all the analytical results in matrix models is their 1/N expansion (where N is the size of the matrix).

# Events Archive

## Donald R. Hamilton Colloquium

### Hamilton Colloquium Series - Razvan Gurau, Centre de Physique Théorique (CPHT), École Polytechnique, France; "Invitation to Random Tensors"

### Hamilton Colloquium Series: Christopher Monroe, JQI and University of Maryland; “Building a Quantum Computer, Atom by Atom”

Laser-cooled and trapped atomic ions are standards for quantum information science, acting as qubits with unsurpassed levels of quantum coherence while also allowing near-perfect measurement.

### Hamilton Colloquium Series: A. J. Stewart Smith, Princeton; “The Path to CP Violation: Remembering Val Fitch and Jim Cronin in Princeton”

Within the past year and a half we have lost Val Fitch and Jim Cronin, two of Princeton’s greatest physicists. Their 1964 discovery of CP Violation in the decays of the long-lived neutral K meson, referred to at the time as “the Princeton Effect,” was a complete surprise, right out of the blue, that defied any and all explanation.

### Hamilton Colloquium Series: Shivaji Sondhi, Princeton; "Statistical Mechanics, Localization and Periodically Driven Quantum Systems"

The statistical mechanics of equilibrium systems is characterized by two fundamental ideas: that closed systems approach a late time thermal state and that of phase structure wherein such late time states exhibit singular changes as various parameters characterizing the system are changed.

### Hamilton Colloquium Series: F. Duncan M. Haldane, Princeton; "Topological Quantum Matter"

The laws of quantum mechanics have been known for nearly a century, and have passed every test that has been made of them. But knowing them does not mean that we understand all that they permit.

### Hamilton Colloquium Series: Neal Weiner, NYU; "The Dark Ages of Dark Matter"

The search for dark matter is among the most challenging in particle physics, because even the question of how to look for it relies on an idea of what it is. The past decade has brought tremendous new data constraining the most popular scenario - the Weakly Interacting Massive Particle or WIMP.

### Hamilton Colloquium Series: David Vanderbilt, Rutgers University; “The search for quantum anomalous Hall insulators”

*Please note this colloquium starts at 4:30 p.m.* The quantum Hall effect, discovered 35 years ago, is a bizarre phenomenon in which a 2D gapped system can nevertheless carry a current. Moreover, the transverse conductivity of the system is precisely quantized in units of e^2/h.

### Hamilton Colloquium Series: Stephen Shenker, Stanford; "Quantum gravity and quantum chaos"

One hallmark of chaos is sensitive dependence to initial conditions, the “butterfly effect.” We will discuss recent advances in our understanding of the quantum butterfly effect and its connection to the quantum physics of black holes. We will discuss a universal bound on the rate of development of quantum chaos motivated by these developments...

### Hamilton Colloquium Series: Markus Greiner, Harvard; “Entanglement Entropy and Quantum Thermalization in Ultracold Atom Quantum Matter”

With quantum gas microscopy we are now able to take the control of ultracold quantum gases in an optical lattice to the next and ultimate level of high fidelity addressing, manipulation and readout of single particles. In my talk I will first give an introduction to this field of research and present an overview of recent experiments.

### Hamilton Colloquium Series: Rana Adhikari, Caltech; "The truth behind the LIGO discoveries"

After 50 years, the gravitational radiation community announced the detection of a binary black hole merger. The radiation traveled through space for a billion years and registered in the LIGO interferometers on Sep. 14.

### Hamilton Colloquium Series: Frans Pretorius, Princeton; "The Dynamical Strong-field Regime of General Relativity"

In this talk I will describe the recent detection of gravitational waves by the LIGO/Virgo collaboration. The main event heard, GW150914, is consistent with the emission of gravitational waves from the late inspiral, merger and ringdown of two heavy stellar mass black holes.

### Hamilton Colloquium Series: Ryan Patterson, Caltech; “Next questions in neutrino physics and the NOvA experiment”

Non-zero neutrino mass brings with it new complexity in the neutrino sector, and major questions surrounding neutrino masses and mixing remain unanswered. Among the unknowns are the ordering of the neutrino masses, key details of flavor mixing, and whether neutrinos respect CP symmetry.

### Hamilton Colloquium Series: John Ellis, King's College London & CERN; “Radioactive Iron Rain: Evidence of a Recent Nearby Supernova Explosion”

A very close supernova explosion could have caused a mass extinction of life in Earth. In 1996, Brian Fields, the late Dave Schramm, and the speaker proposed looking for unstable isotopes such as Iron 60 that could have been deposited by a recent nearby supernova explosion.

### Hamilton Colloquium Series - Harald Hess, HHMI Janelia Research Campus: "Innovating Microscopy: From Atoms to Biology"

Microscopy has played important roles in revealing new insight in diverse fields of research ranging from physics to biology. It likewise is an important component of controlling nano-scale structures in the semiconductor industry.

### Hamilton Colloquium Series - Vladan Vuletic, MIT: "What does the Golden Ratio have to do with friction? An answer atom by atom."

Friction is the basic, ubiquitous mechanical interaction between two surfaces that results in resistance to motion and energy dissipation. To test long-standing atomistic models of friction processes at the nanoscale, we have implemented a synthetic nanofriction interface using laser cooled ions subject to the periodic potential of an optical...

### Hamilton Colloquium Series - David Snoke, U. Pittsburgh: "Superfluids of light: Bose-Einstein condensation of polaritons in microcavities"

In specially designed solid microcavities, the photon properties can be altered to have effective mass and repulsive interactions; these new states are called "polaritons". The polaritons act like atoms, and because they are bosons, they can undergo Bose-Einstein condensation.

### Hamilton Colloquium Series - Dam Thanh Son, University of Chicago: "Surprises with Dirac fermions in condensed matter"

Starting with the discovery of graphene, the Dirac equation has appeared in many different contexts in condensed matter physics. In this talk I will describe two recent developments: the effects of chiral anomalies in Weyl and Dirac materials, and the Dirac nature of the composite fermion in the many-body physics of the half-filled Landau level...

### Hamilton Colloquium Series - Kerstin Perez, Haverford: “In Search of Cosmic-Ray Antinuclei from Dark Matter”

Cosmic-ray antiprotons have been a valuable tool for dark matter searches since the 1970s. Recent years have seen increased theoretical and experimental effort towards the first-ever detection of cosmic-ray antideuterons, in particular as an indirect signature of dark matter annihilation or decay in the Galactic halo.

### Hamilton Colloquium Series - Joseph Curtin, Joseph Curtin Studios: “Can Stradivari’s Sound Be Measured?”

A longstanding goal of violin research has been to establish objectively measurable parameters for violin quality. These would presumably substantiate one of the violin-world’s most passionately held beliefs: Violins made by Stradivari and his contemporaries in 18th Century Italy sound better than any made elsewhere or since.

### CANCELLED: Hamilton Colloquium Series

The colloquium talk that was scheduled for Thursday, Feb. 18 has been cancelled.