UVA HOME  |  CONTACT US  |  MAP
 
Support UVa's Physics Department! >>
Click here for a printable version of this page.

High Energy Physics Seminars

ics High Energy
Wednesday, October 25, 2006
3:30 PM
Physics Building, Room 204
Qinghai Wang [Host: Paul Fendley]
Unversity of Connecticut
"Worldline Instantons and Pair Production"
ABSTRACT:
The imaginary part of the QED effective action can be approximated by the contribution of a worldline instanton, a solution to the classical Euclidean worldline equations of motion. In this talk, I will briefly review this formalism and compute also the prefactor arising from quantum fluctuations about this classical path. I will show the excellent agreement between our semiclassical approximation, conventional WKB, and numerical results using numerical worldline loops. I will also show the extension of the worldline instanton technique to multidimensional spatially inhomogeneous electric background fields, for which, WKB failed to apply.

To add a speaker, send an email to phys-speakers@Virginia.EDU. Please include the seminar type (e.g. High Energy Physics Seminars), date, name of the speaker, title of talk, and an abstract (if available).