Speaker: Dr. Sven Sturm (MPIK Heidelberg)
Title of Talk: Probing the standard model with precision Penning traps
Abstract: Cryogenic Penning traps have proven to be a powerful tool for probing the boundary of validity of our standard model of physics by comparing precise measurements with theory predictions. Such traps allow suspending a wide range of ions and particles – including highly charged ions and antimatter – in free space, protected from uncontrolled interactions with the environment. Then, their motional frequencies in the magnetic field of the trap as well as their internal quantum state and specifically spin precession frequencies can be measured precisely.
The ultra-precise determination of the g-factor of highly charged ions with the ALPHATRAP experiment at MPIK for example allows testing the validity of quantum electrodynamics (QED) in strong electric fields, ranging up to an extreme $10^{16}$~V/cm in the case of hydrogenlike lead $^{208}$Pb$^{81+}$ . Furthermore, the new LSym (Lepton Symmetry Experiment) project will search for a possible violation of CPT (charge-parity-time reversal) symmetry, indicated by an asymmetry between matter and antimatter, by crystalising a single positron and an electron and comparing their properties with orders of magnitude higher precision than previously possible. I will introduce cryogenic Penning traps and our toolbox and present our recent experiments.
Venue (HYBRID-EVENT): Goldene Box, Physikalisches Institut, INF 226, 69120 Heidelberg AND all talks will also be streamed via the permanent Zoom-link:
https://zoom.us/j/94602401603?pwd=SVRYMHQxaWJrUGtFWXRWdkFaKzJVUT09
Meeting ID: 946 0240 1603
Passcode: 386993
Schedule:
13:30-14:00 talk+questions
14:00-14.15 discussion and questions
14.15-14:30 pizza
______________________________________________________________________________________________
The aim of the YRC Lunch Seminar is to promote individual research done by young researchers within Isoquant and create a regular platform to socialize and share ideas.