Category Archives: Publications

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

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)

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!

Calculations of Rydberg interaction potentials

Our manuscript on the calculation of full Rydberg-Rydberg interaction potentials including angular dependencies and external electric and magnetic fields is now published as a tutorial paper in J. Phy.s B. Have a look at the published article J. Phys. B, 50, 13 or the preprint arXiv:1612.08053 !

On top, we provide the software for the calculation of such interaction potentials as an open-source project. Both the source code as well as installers for Windows, Linux and Mac OS are freely available at
github. For information about future releases and updates to the software, you can sign our mailing list there.

New results published in PRL!

Our work realizing a single-photon absorber was published in PRL and is featured as an editor’s suggestion!

If you are interested how we saturate a dense atomic sample with one photon and make it transparent for up to 35 subsequent
photons, please take a read.

C. Tresp, C. Zimmer, I. Mirgorodskiy, H. Gorniaczyk, A. Paris-Mandoki, & S. Hofferberth,
Single-Photon Absorber Based on Strongly Interacting Rydberg Atoms,
Phys. Rev. Lett. 117, 223001 (2016)

Enhancement of Rydberg-mediated single-photon nonlinearities by electrically tuned Förster resonances

title pic

We are very happy to announce the publication of our work on electrically tuned Förster resonances on Nature Communications. If you are interested in how these resonances boost the nonlinearity on the single photon level, have a read (open access)!

H. Gorniaczyk, C. Tresp, P. Bienias, A. Paris-Mandoki, W. Li, I. Mirgorodskiy, H. P. Büchler, I. Lesanovsky & S. Hofferberth,
Enhancement of Rydberg-mediated single-photon nonlinearities by electrically tuned Förster resonances,
Nature Communications 7, 12480 (2016)


New results on arXiv!

transistor2-title-picWe are very happy to present our latest work on the single photon transistor! With experimental efforts on the implementation of electric field control, we were able to substantially enhance the transistor tuning it on a Förster resonance. At the same time, the system incorporates a pair state spectroscopy method. Thanks to our theory collaborators Przemek Bienias and Hans Peter Büchler, we can nicely model the source polariton propagation through a gate excitation. We further study the coherence properties of the gate spin-wave and find very good agreement with theory developed by Weibin Li and Igor Lesanovsky.
Find our results here: arXiv:1511.09445