Physics and Astronomy Colloquia

*Winter Quarter Colloquia Start at 4:00 pm*

Title: Topological photonics: from classical to quantum

Speaker: Mohammed Hafezi, University of Maryland

Abstract: There are tremendous efforts underway to better understand systems with topological order --- global properties that are not discernible locally. The best-known examples are quantum Hall effects in electronic systems, where insensitivity to local properties manifests itself as conductance through edge states which is insensitive to defects and disorder. In this talk, I demonstrate how similar physics can be observed for photons; specifically, how various quantum Hall Hamiltonians can be simulated in an optical platform. I report on the first imaging and measurement of topological photonic edge state using silicon-on-insulator technology and our recent advance in studying the quantum transport of such topological photonic structures. Furthermore, the addition of optical nonlinearity to this system provides a platform to implement fractional quantum Hall states of photons and anyonic states that have not yet been observed. More generally, the application of these ideas can lead to the development of optical devices with topological protection for classical and quantum information processing.

Host: Koch

Speaker Schedule

Keywords: Physics, Astronomy, colloquium


Title: Space astrometry: the Hipparcos and Gaia missions

Speaker: Michael Perryman

Abstract: 

Alone amongst the space agencies, ESA made its entry into space astrometry with the adoption of the Hipparcos mission in 1981. Outside of the astrometric community, it was viewed at the time as fundamental if not particularly exciting, although Freeman Dyson described it as "... the first time since Sputnik in 1957 that a major new development in space science has come from outside the US". In his ASP Millennium Essay in 2001, Cavendish Professor Malcolm Longair stated that "It is invidious to single out surveys which I find particularly impressive, but I make an exception for the Hipparcos astrometric satellite".

Hipparcos delivered its high-accuracy catalogue of 120,000 star distances and space motions in 1997. As a follow-up, ESA accepted the Gaia mission in 2000. Launched in 2013 and expected to operate into the next decade, Gaia will represent a revolution in its dynamical stereoscopic mapping of our Galaxy, promising a catalogue of more than a billion stars to 20 magnitude at microarcsec-level accuracy.

The talk will provide a short historical context and describe the scientific motivation for these missions, outline the essential experimental principles which underpin their measurements, and give an overview of the science objectives, including Gaia's expected yield of many thousands of astrometrically-detected exoplanets.

Host: Lithwick

Speaker Schedule

Keywords: Physics, Astronomy, colloquium


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Vincenzo Cirigliano: TBA

March 3, 2017, 4:00 PM - 5:00 PM

Title: TBA

Speaker: Vincenzo Cirigliano, Los Alamos National Laboratory

Abstract: TBA

Host: Andre

Speaker Schedule

Keywords: Physics, Astronomy, colloquium


Title: The Tools and Techniques of Particle Physics and Their Impact on Society

Speaker: Marcel Demarteau, Argonne National Laboratory

Abstract: Particle physics shares with other basic sciences the need to innovate, invent, and develop tools, techniques, and technologies to carry out its mission. This dedicated research and development has not only advanced the current state of technology for particle physics, but has also enabled basic scientific research and applications in numerous other areas. The history of particle physics contains many stories of invention that illustrate the interplay between different fields of science and society. This presentation will showcase some of the key tools, techniques, and technologies that connect particle physics to other science disciplines, to industry, and to society as a whole. Particle physics has a deep and sometimes unexpected reach into society. Its return on investment for society will be outlined.

Host: De Gouvea & Low

Speaker Schedule

Keywords: Physics, Astronomy, colloquium


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Yuval Grossman: TBA

March 31, 2017, 4:00 PM - 5:00 PM

Title: TBA

Speaker: Yuval Grossman, Cornell University 

Abstract: TBA

Host: Andre

Speaker Schedule

Keywords: Physics, Astronomy, colloquium


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Dirk Englund: TBA

April 7, 2017, 4:00 PM - 5:00 PM

Title: TBA

Speaker: Dirk Englund, MIT


Abstract: TBA

Host: Koch

Speaker Schedule

Keywords: Physics, Astronomy, colloquium


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Martin Zweirlein: TBA

April 14, 2017, 4:00 PM - 5:00 PM

Title: TBA

Speaker: Martin Zweirlein, MIT


Abstract: TBA

Host: Halperin/Garg

Speaker Schedule

Keywords: Physics, Astronomy, colloquium


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Steve Girvin: TBA

April 21, 2017, 4:00 PM - 5:00 PM

Title: TBA

Speaker: Steve Girvin, Yale

Abstract: TBA

Host: Koch

Speaker Schedule

Keywords: Physics, Astronomy, colloquium


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Dave Arnett: TBA

April 28, 2017, 4:00 PM - 5:00 PM

Title: TBA

Speaker: Dave Arnett, University of Arizona


Abstract: TBA

Host: Kalogera

Speaker Schedule

Keywords: Physics, Astronomy, colloquium


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Robert Boyd: TBA

May 5, 2017, 4:00 PM - 5:00 PM

Title: TBA

Speaker: Robert Boyd

Abstract: TBA

Host: Selim

Speaker Schedule

Keywords: Physics, Astronomy, colloquium


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Maxim Popselov: TBA

May 12, 2017, 4:00 PM - 5:00 PM

Title: TBA

Speaker: Maxim Popselov, Perimeter

Abstract: TBA

Host: Andre

Speaker Schedule

Keywords: Physics, Astronomy, colloquium


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Laura Newburgh: TBA

May 19, 2017, 4:00 PM - 5:00 PM

Title: TBA

Speaker: Laura Newburgh, Yale

Abstract: TBA

Host: Ulmer

Speaker Schedule

Keywords: Physics, Astronomy, colloquium


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Neil Kelleher: TBA

May 26, 2017, 4:00 PM - 5:00 PM

Title: TBA

Speaker: Neil Kelleher, Northwestern University

Abstract: TBA

Host: Ulmer

Speaker Schedule

Keywords: Physics, Astronomy, colloquium


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Thomas Udem: TBA

October 6, 2017, 4:00 PM - 5:00 PM

Title: TBA

Speaker: Thomas Udem, Max-Planck Institut fuer Quantenoptik  

Abstract: TBA

Host: Gabrielse

Speaker Schedule

Keywords: Physics, Astronomy, colloquium