Physics and Astronomy Colloquium Series

Next Seminar

*Tuesday, Dec. 6, 2016

Sac State Physics Majors' Senior Project Talks
Mark Cratty

"Hadamard's Method and the Heisenberg Subelliptic Laplacian"

In 1973, Folland constructed the fundamental solution of the sublaplacian on the Heisenberg group, using the group of dilations and mimicking the case of the Euclidean Laplacian.  In our work, we take a different approach. Recent developments in geodesic theory for the sublaplacian lead us to use a different geometric method pioneered by Hadamard.  We add an auxiliary term to the sublaplacian to make it a wave-type operator. Then we apply Hadamard's parametrix construction, which Hadamard used to solve the Cauchy problem for the wave equation on a curved space-time.  The Hadamard parametrix we construct approximates the fundamental solution for the wave-type modified operator.  It is singular along the surface of a conoid.  Finally, we take the limit as the auxiliary term goes to zero.  We then compare our form of the fundamental solution of the sublaplacian to Folland's.

The Physics and Astronomy Colloquium Series is open to all members of the university. Unless otherwise noted, talks are held on Thursday afternoons at 4:00-5:20 in Mendocino 1015. Schedule is regularly updated as dates, titles, and abstracts are received. Please check back often. To receive updates about the Colloquium Series, please join our Events Mailing List. For past semesters' series, see our archive.

Fall 2016 Semester Schedule

September 1, 2016
Haley Marez, Leah Weston, Aleksander Tadic, Mary Ann Mort, Caleb Mosakowski
Sacramento State Physics Majors
"Want to Know What I Did Last Summer?"

September 8, 2016
Prof. Roger Freedman
University of California, Santa Barbara
"Physics of Flight"

Sept. 15, 2016
Dr. Wesley Frey
UC Davis McClellan Nuclear Research Center
"Introduction to Health Physics and the McClellan Nuclear Research Center (MNRC)"

Sept. 22, 2016
Mr. Thomas Scarry and Mr. Peter Helldorfer
Sacramento State
"Demonstration Demonstration"

Oct. 6, 2016
Dr. Ching Lin
Sacramento State
"High Pressure NMR: the Exploration of the Hyperfine Coupling, and the Novel Design of Diamond Anvil Cell"

October 13, 2016
College of Natural Sciences Undergraduate Research Symposium
Special Location: University Union Redwood Room

October 20, 2016
Ms. Valentina Prilepina
UC Davis 
"A Gateway into Conformal Field Theory"

October 27, 2016
Prof. Tobias Owen
University of Hawai'i
"Exploring Jupiter with Juno"

November 17, 2016
CANCELED - hoping to reschedule for Spring 2017
 Dr. Sebastian Wachsmann-Hogiu
UC Davis Center for Biophotoics

December 1, 2016
Senior Project Talks
Peter Helldorfer
"Development Process of a Low Cost High Accuracy Three-Axis Magnetometer Unit for Sensing Earth's Magnetic Field by Averaging Output of Several Magnetometer Microchips"
 Ashley Luiz
"Modeling of Tropomyosin Binding and Polymerization on Filamentous Actin"

*Tuesday, December 6, 2016
Senior Project Talks
Mark Cratty
"Hadamard's Method and the Heisenberg Subelliptic Laplacian"

December 8 2016
Senior Project Talks
Sergei Mistyuk
"Computationally Modeling Microwave Superlenses"


Zakery Tridente-Bruns
"Exploring  Quantum Phase Transitions in SU(N) and SO(N) Models with Quantum Monte Carlo"