Poster Prize at the Dansk Fysisk Selskab

We congratulate Nina Stiesdal on the prize of the best poster at this year’s meeting of the Danish Physical Society 2018! She presented the work of the previous experiments which comprises the observation of two- and three-photon correlations mediated by a single Rydberg superatom.

Observation of three-body correlations for photons coupled to a Rydberg superatom

In a recent experiment we have investigated how a single Rydberg superatom mediates three-body correlations between photons. The experiment follows the line of our previous experiments on a single Rydberg superatom. The observation of three-photon correlations has led to a joint publication with collaborators from Universität Stuttgart.

arXiv.org – N. Stiesdal, J. Kumlin, K. Kleinbeck, P. Lunt, C. Braun, A. Paris-Mandoki, C. Tresp, H. P. Büchler,  S. Hofferberth: Observation of three-body correlations for photons coupled to a Rydberg superatom

Photon Subtraction by Many-Body Decoherence

In a collaboration with theorists from Aarhus University and the Joint Quantum Institute at the University of Maryland, USA, we have studied a new decoherence-suppression mechanism in photon-photon scattering is revealed in a Rydberg electromagnetically-induced transparent medium. We were very happy to see the publication featured as editors choice!

Photon Subtraction by Many-Body Decoherence C. R. Murray, I. Mirgorodskiy, C. Tresp, C. Braun, A. Paris-Mandoki, A. V. Gorshkov, S. Hofferberth, and T. Pohl Phys. Rev. Lett. 120, 113601 – Published 13 March 2018

New Bachelor Student

Tom Asmussen has joined us as a new bachelor student. Tom will work on a high resolution imaging setup for the Rydberg experiment for the next four months! Velkommen til holdet!

Free-Space Quantum Electrodynamics with a Single Rydberg Superatom

In a recent experiment we have investigated the interaction of a propagating few-photon field interacting with an single two-plus-one level system. The system was realized by collectively coupling thousands of atoms to a Rydberg state in order to form a Rydberg superatom.

A. Paris-Mandoki, C. Braun, J. Kumlin, C. Tresp, I. Mirgorodskiy, F. Christaller, H. P. Büchler, and S. Hofferberth
Free-Space Quantum Electrodynamics with a Single Rydberg Superatom
Phys. Rev. X 7, 41010 (2017)


Back in business

Within 6 months, we have rebuilt our Rydberg apparatus from scratch in our new lab. What was a completely empty room in early April is now the coolest place (2 μK) at SDU. We are currently putting the last touches on our Rydberg excitation system, then we are ready to go! You can see some pictures from the new lab and of the first steps towards single-photon interaction at SDU here.

New Master Student

Nina Stiesdal has joined us as the first new Master student at our new home SDU. She will join the Rydberg superatom experiment for the next 10 months! Velkommen til holdet!

Results on EIT with Rydberg molecules published in PRA

Our work investigating the role of Rydberg molecules in storage and retrieval of single photons has been published in PRA:

I. Mirgorodskiy, F. Christaller, C. Braun, A. Paris-Mandoki, C. Tresp and S. Hofferberth,
”Electromagnetically induced transparency of ultra-long-range Rydberg molecules”
Phys. Rev. A, 96, 011402 (2017)

Very similar results had previously been observed in the MPQ Quantum Dynamics group!