The David and Edith Harris Physics Colloquium Series

fall 2015 Schedule

Thursdays - Socials: 3:30pm in 4-349 (The Pappalardo Room) // Talk: 4:00pm in 10-250 (unless otherwise noted)

SEPTEMBER 10, 2015
SUCHITRA SEBASTIAN
University of Cambridge
Host: Graduate Women in Physics

"Identifying exotic electronic ground states using quantum oscillations"

Electrons traversing momentum space orbits in conducting materials yield classic signatures in transport and thermodynamic properties as a function of magnetic field. These undulatory signatures - known as 'quantum oscillations' - were first predicted and oberved in elemental metals. Since then, this experimental tool has found widespread use in mapping the characteristic electronic structures of strongly correlated materials ranging from heavy fermions to unconventional superconductors. I will present the surprising observation of quantum oscillations in interacting materials with apparently little in common with conventional metals; namely the exotic cuprate high temperature superconductors, and the Kondo insulating material samarium hexaboride. I will demonstrate how quantum oscillations prove a powerful tool to identify exotic ground states in strongly correlated electron systems.

Time: 4:00 pm
Place: Room 10-250
Refreshments @ 3:30 pm in 4-349 (Pappalardo Community Room)

SEPTEMBER 17, 2015
MARKUS KLUTE
MIT
Host: TBA

"Unveiling the Secrets of Nature: the Post-Higgs Discovery Era"

We found the Higgs boson, but where is everybody else? The first run of the Large Hadron Collider (LHC) at CERN was a remarkable success. Its highlight, the Higgs Boson discovery in 2012, completed the Standard Model of fundamental particle interactions. Yet, with the restart of the LHC in June 2015, the particle physics community expects that the era of even deeper discovery is just beginning. In this talk I will describe the landscape of post-Higgs discovery, explain why LHC physicists are so excited about the potential discoveries of the more powerful LHC, and give insights into a possible roadmap for particle physics beyond the LHC.

Time: 4:00 pm
Place: Room 10-250
Refreshments @ 3:30 pm in 4-349 (Pappalardo Community Room)

SEPTEMBER 24, 2015
GREGORY BOEBINGER
Florida State University
Host: TBA

Title and abstract to be posted.

Time: 4:00 pm
Place: Room 10-250
Refreshments @ 3:30 pm in 4-349 (Pappalardo Community Room)

OCTOBER 1, 2015
PAUL SCHECHTER
MIT
Host: TBA

"The Gravitational Macro- and Micro-lensing of Quasars and the Ratio of Dark to Baryonic Matter in Galaxies"

In the time since the photons of the cosmic microwave background were last scattered, the universe has grown increasingly inhomogeneous. Dark and baryonic matter, once uniformly mixed, have become progressively more segregated. Observations of the motions of stars and gas in galaxies give total masses, but do not isolate the contributions of the dark and baryonic components. Observations of the micro-lensing of multiply imaged quasars by the stars within those galaxies permits measurement of the stellar mass component. We report results from such micro-lensing observations.

Time: 4:00 pm
Place: Room 10-250
Refreshments @ 3:30 pm in 4-349 (Pappalardo Community Room)

OCTOBER 8, 2015
PAPPALARDO LECTURE
JOHN CARLSTROM

University of Chicago
Host: Robert Simcoe

"Physics and Cosmology with the Cosmic Microwave Background"

The study of the cosmic microwave background (CMB) has driven spectacular advances in our understanding of the origin, make-up, and evolution of our universe. We now have a standard cosmological model, LCDM, that fits all the cosmological data with only six parameters, although there are some tensions that may hint at cracks in the model. Far from being the last word in cosmology, the model points to exciting times ahead using the CMB to explore new physics, i.e. inflation, dark matter, dark energy, neutrino masses and possible additional relativistic species, or dark radiation. This talk will review the latest results and near term plans for CMB measurements, with emphasis on the South Pole Telescope, and briefly discuss plans for the next generation experimental program CMB-S4.

Time: 4:00 pm
Place: Room 10-250
Refreshments @ 3:30 pm in 4-349 (Pappalardo Community Room)

OCTOBER 15, 2015
TBA
Host: TBA

Title and abstract to be posted.

Time: 4:00 pm
Place: Room 10-250
Refreshments @ 3:30 pm in 4-349 (Pappalardo Community Room)

OCTOBER 22, 2015
JOERG SCHMIEDMAYER
Vienna University of Technology
Host: Wolfgang Ketterle

Title and abstract to be posted.

Time: 4:00 pm
Place: Room 10-250
Refreshments @ 3:30 pm in 4-349 (Pappalardo Community Room)

OCTOBER 29, 2015
BRIAN KEATING
University of California, San Diego
Host: Andrew Friedman

Title and abstract to be posted.

Time: 4:00 pm
Place: Room 10-250
Refreshments @ 3:30 pm in 4-349 (Pappalardo Community Room)

NOVEMBER 5, 2015
GAVIN CROOKS
Lawrence Berkeley National Laboratory
Host: Physics Graduate Student Council

Title and abstract to be posted.

Time: 4:00 pm
Place: Room 10-250
Refreshments @ 3:30 pm in 4-349 (Pappalardo Community Room)

NOVEMBER 12, 2015
XIAOWEI ZHUANG
Howard Hughes Medical Institute and Harvard University
Host: Ibrahim Cissé

"Illuminating Biology at the Nanoscale with Single-Molecule and Super-Resolution Fluorescence Microscopy"

Dissecting the inner workings of a cell requires imaging methods with molecular specificity, molecular-scale resolution, and dynamic imaging capability such that molecular interactions inside the cell can be directly visualized. Fluorescence microscopy is a powerful imaging modality for investigating cells largely owning to its molecular specificity and dynamic imaging capability. However, the spatial resolution of light microscopy, classically limited by diffraction to a few hundred nanometers, is substantially larger than molecular length scales in cells, making many sub-cellular structures difficult to resolve. We developed a super-resolution fluorescence microscopy method, stochastic optical reconstruction microscopy (STORM), which breaks the diffraction limit by using photo-switchable fluorescent probes to temporally separate the spatially overlapping images of individual molecules. This approach has allowed multicolor and three-dimensional imaging of living cells with nanometer-scale resolution and enabled discoveries of novel sub-cellular structures. In this talk, I will discuss the recent technological advances and biological applications of STORM.

I will also describe a single-cell transcriptome imaging method that we recently developed. System-wide analyses of the abundance and spatial organization of RNAs in single cells promise to transform our understanding in many areas of cell and developmental biology, such as the mechanism of gene regulation, the heterogeneous behavior of cells, and the development and maintenance of cell fate. Single-molecule imaging approaches are powerful tools for counting and mapping RNA; however, the number of RNA species that can be simultaneously imaged in individual cells has been limited, making it challenging to perform transcriptomic analysis of single cells in a spatially resolved manner. To overcome this challenge, we developed a transcriptome imaging approach, multiplexed error-robust fluorescent in situ hybridization (MERFISH), which allows numerous RNA species to be localized and quantified in single cells in situ. In this talk, I will also discuss the technology development and application of MERFISH.

Time: 4:00 pm
Place: Room 10-250
Refreshments @ 3:30 pm in 4-349 (Pappalardo Community Room)

NOVEMBER 19, 2015
ALBERTO NICOLIS
Columbia University
Host: Jesse Thaler

Title and abstract to be posted.

Time: 4:00 pm
Place: Room 10-250
Refreshments @ 3:30 pm in 4-349 (Pappalardo Community Room)

DECEMBER 3, 2015
PRATHEEV SREETHARAN
CEO, Vibrant Composites Inc.
Host: Peter Fisher

Title and abstract to be posted.

Time: 4:00 pm
Place: Room 10-250
Refreshments @ 3:30 pm in 4-349 (Pappalardo Community Room)

DECEMBER 10, 2015
SELIM JOCHIM
University of Heidelberg
Host: Martin Zwierlein

Title and abstract to be posted.

Time: 4:00 pm
Place: Room 10-250
Refreshments @ 3:30 pm in 4-349 (Pappalardo Community Room)

Last updated on September 2, 2015 10:42 AM