5-11 February 2017
Hyatt Regency Chicago
America/Chicago timezone

Classical electromagnetic fields from quantum sources in heavy-ion collisions

8 Feb 2017, 09:50
Regency C

Regency C

Oral New Theoretical Developments Parallel Session 5.3: New Theoretical Developments (I)


Mr Balthazar Peroutka (Iowa State University)


Electromagnetic fields are generated in high energy nuclear collisions by spectator valence protons. These fields are traditionally computed by integrating the Maxwell equations with point sources. One might expect that such an approach is valid at distances much larger than the proton size and thus such a classical approach should work well for almost the entire interaction region in the case of heavy nuclei. We argue that, in fact, the contrary is true: due to the quantum diffusion of the proton wave function, the classical approximation breaks down at distances of the order of the system size.
We compute the electromagnetic field created by a charged particle described initially as a Gaussian wave packet of width 1~fm and evolving in vacuum according to the Klein-Gordon equation. We completely neglect the medium effects. We show that the dynamics, magnitude and even sign of the electromagnetic field created by classical and quantum sources are different.

Collaboration Not applicable
Preferred Track New Theoretical Developments

Primary author

Mr Balthazar Peroutka (Iowa State University)

Presentation materials