Time, Place:

09:30 ,https://zoom.us/j/92757704620?pwd=QnlXUmlUblRvTjUxZzhjSXhkV0FMQT09

Speaker:

Alexander Dorn, Ultra-cold dynamics and collisions

Title:

Ionization dynamics of atomic and molecular dimers

Meeting-ID: 927 5770 4620Kenncode: 126155

Time, Place:

16:30 ,Zoom

Speaker:

Dr. Stefano Gariazzo (Torino)

Title:

Cosmic Neutrino Background

https://zoom.us/j/94148305916?pwd=alc3V2MwYXBTWGxwSnNjL2QyWG5kQT09 A background radiation of relic neutrinos, originated during the earlyphases of the Universe expansion, is predicted by the standardcosmological model, but has never been confirmed by a directmeasurement.Indirect probes already provide information on relic neutrinos, butfuture direct detection experiments will give us many more details tounderstand the properties of these extremely elusive particles.In this seminar, I will review some of the aspects related to thetheoretical study of relic neutrinos properties, including standardand non-standard physics: I will talk about their momentumdistribution function, local number density, and additional neutrinostates. I will also discuss what future direct detection experiments,such as PTOLEMY, can teach us.

Time, Place:

11:15 ,Zoom

Speaker:

Dr. Zheng Gong, MPIK

Title:

Electron acceleration and photon emission in ultrarelativistic plasma irradiated by circularly polarized laser pulse (online seminar)

LINK: https://zoom.us/j/94017339467?pwd=jaYZQt2bNkgDq0ia2t53CFvj6kaX6Q \\ MEETING ID: 94017339467 \\ PASSWORD: 153366

Time, Place:

11:15 ,https://zoom.us/j/98843346440?pwd=WEpEOW44YkJ1L2hYQnhjcVM4MkJ5Zz09

Speaker:

Dominik Lentrodt, Quantum Dynamics Group

Title:

X-ray cavity QED with Mössbauer ensembles

Meeting-ID: 988 4334 6440Kenncode: 484929Abstract: In the last decades, quantum mechanics has transitioned from a fundamental science to new technologies. A cornerstone of this development has been the identification and control of suitable quantum systems, in particular two-state systems known as qubits for information processing. Within the hunt for novel qubits, Mössbauer transitions in atomic nuclei have recently started to be considered as a platform for quantum optics. Their extreme properties, including high transition energies in the hard x-ray regime and ultra-low decoherence, are promising for realising new regimes of light matter interactions. In this talk, I will present recent progress in implementing an x-ray version of optical cavity QED with such systems. In particular, I will discuss a class of loss-induced multi-mode effects, which appear due to the unusual regimes at these energies, and their theoretical interpretation, which requires extensions of one of the central models in cavity QED - the Jaynes-Cummings model. I will further outline the prospects and challenges of realising nonlinear and correlated quantum effects with Mössbauer nuclei in upcoming experiments at modern x-ray facilities.

Time, Place:

16:30 ,Zoom

Speaker:

Dr. Tongyan Lin (San Diego)

Title:

Dark matter direct detection with dielectrics

https://zoom.us/j/94148305916?pwd=alc3V2MwYXBTWGxwSnNjL2QyWG5kQT09

Time, Place:

11:15 ,Zoom

Speaker:

Sreya Banerjee, MPIK

Title:

Towards a path integral formulation of bound-state QED (online seminar)

LINK: https://zoom.us/j/94017339467?pwd=jaYZQt2bNkgDq0ia2t53CFvj6kaX6Q \\ MEETING ID: 94017339467 \\ PASSWORD: 153366

Time, Place:

11:15 ,Zoom

Speaker:

Dr. Werner Rodejohann (MPIK)

Title:

How to distinguish a particle from its antiparticle

https://zoom.us/j/92680652991?pwd=bktlZDFFQUZlejNhL3F5b3pmK0tYZz09Meeting ID: 926 8065 2991Passcode: 418920The question on whether neutrinos are their own antiparticles, Majorana neutrinos, is crucial not only for neutrino physics, but also for particle physics and cosmology. Searches for neutrinoless double beta decay are crucial to answer the question. The physics potential of experiments looking for double beta decay is discussed, which is broader than just determining the neutrino nature. The potential of determining the Majorana nature in case there are additional interactions beyond the Standard Model is also discussed. Finally, it is investigated if one can experimentally distinguish whether the dark matter particle is its own antiparticle or not.

Time, Place:

15:00 ,Zoom Online Seminar. Please contact Gabi Weese (sekretariat.blaum@mpi-hd.mpg.de) to get access data

Speaker:

Peter Plattner, MPIK/CERN

Title:

The Charge Radius of 26mAl and the Design of an Advanced Optical Detection Region for Collinear Laser Spectroscopy