Experimental Quantum Optics
and Photonics Group


Latest News

Self-organized length scales beyond the linear Talbot effect.

In a collaboration with the INPHYNI in Nice and the TU Vienna which just appeared in Physical Review A we are looking now at the interplay of diffraction within the atomic cloud and diffraction in vacuum. It turns out that for most situations it is sufficient to look at the linear Talbot effect but things get more involved, if one puts the mirror “into the cloud”. If you are curious, how to do this and what the resulting length scales are, please look at Phys. Rev. A 111, 063506.

Spontaneously Sliding Multipole Spin Density Waves in Cold Atoms.

Spontaneously Sliding Multipole Spin Density Waves in Cold Atoms reported in Physical Review Letters

Generating Multiparticle Entangled States by Self-Organization.

Generating Multiparticle Entangled States by Self-Organization of Driven Ultracold Atoms reported in Physical Review Letters

Review: Self-Organization in Cold Atoms Mediated by Diffractive Coupling.

Review on self-organization with single-mirror feedback “Self-Organization in Cold Atoms Mediated by Diffractive Coupling” in atoms

MSCA-ETN ColOpt funded.

Thorsten Ackemann coordinates MSCA-European Training Network ColOpt (Collective Effects and Optomechanics in Ultra-cold Matter)

Recent publications

A review and collection of metrics and benchmarks for quantum computers: definitions, methodologies and software
(2025)
Quantum computers have the potential to provide an advantage over classical computers in a number of areas. Numerous metrics to …
Speeding up quantum measurement using space-time trade-off
Physical Review Letters 134, (2025)
We present a scheme for speeding up quantum measurement. The scheme builds on previous protocols that entangle the system to be …
A quantum wire approach to weighted combinatorial graph optimisation problems
Arxiv (2025)
Demonstration of weighted graph optimization on a Rydberg atom array using local light-shifts
PRX Quantum 6, (2025)
Neutral-atom arrays have emerged as a versatile platform toward scalable quantum computation and optimization. In this paper, we …
Graph Coloring via Quantum Optimization on a Rydberg-Qudit Atom Array
Arxiv (2025)