Quantum Information & Quantum Simulations @Jena

🎓👏congratulations to @AasenAadrian for successfully defending his PhD thesis! all that work mitigating noise clearly paid off, and no safety helmet was needed during the defence!

we have an open postdoc position in algorithm design for Rydberg quantum computers. feel free to share with potential applicants! application open until 27th dec 2025 qiqs-jena.de/hire/

🚀we present a method to certify high-dimensional time-bin entanglement in fiber-loop systems, crucial for advancing QKD, that is: ✅noise-resilient ✅adaptable entanglement dimension ✅requires only two measurement bases & works with limited data journals.aps.org/pra/abstract/1…

💡new paper on PRA: we show how entanglement can be verified using only a separable coherent state as a reference state! 🔎our separability criteria can be accessed by using an interferometric setup and photon-number detection journals.aps.org/pra/abstract/1…

back from our annual group retreat in the mountains in Ehrwald, Austria 🌄 with no shortage of hiking, stunning views, as well as discussions on physics and ways to improve as a research group, it was an all-round success

📢Introducing a scalable & experiment-friendly readout error mitigation scheme. We combine overlapping detector tomography with hierarchical clustering, avoiding randomized measurement & entangling gates, & apply this to systems of up to 100 qubits. journals.aps.org/pra/abstract/1…

Yesterday @AdrianBraemer successfully defended his PhD thesis, having worked on quantum thermalization and disordered spin systems. Congratulations! 🎉

And we are back from the group’s annual retreat, this time held in Rathen🌲We hiked, discussed physics and explored synergies💡Now it’s time to materialise our generated ideas back in Jena!

Want to know how to correct the readout errors of your quantum device? See our protocol and experimental realization in Commun. Phys. nature.com/articles/s4200…

The Husimi Q distribution is a phase space representation of quantum states, just like the Wigner function, but it doesn't get negative. Still, it can be used to detect entanglement, with advantages for experiments with sparse data... journals.aps.org/prl/abstract/1…

We have used supervised learning to estimate entanglement entropy and quantum mutual information in spin chains using very few experimental samples. On top, the method also estimates the statistical error. Comments welcome! arxiv.org/abs/2309.07556

The 2023 edition of the EFEQT Quantum Ideas Factory, a quantum hackathon for Master and PhD students, is happening in Paris on October 21-23. Participation is highly recommend! Apply here before 10.9. efeqt.eu/index.php/quan…

Apply now to the 2023 Quantum Ideas Factory, a quantum science and technology hackathon! This time in Paris. For more info, see efeqt.eu/index.php/quan…

PhD and Postdoc positions available! Want to do work on Quantum Information Theory and Quantum Many-Body Physics in a growing and dynamic team @UniJena? Then apply now! For more information, see our website: mbqd.de

Now it is official: The group is moving to Jena in fall. We are looking forward to new challenges in the city of light!

We are excited to announce the Bernoulli workshop on “Quantum-Classical Quantum Simulation”, @EPFL_en , from 8 to 12 May 2023. Registration is now open! qcqs.org

'Variational #MonteCarlo approach to partial differential equations with #neuralnetworks' by @RehMoritz @magaerttner @GaerttnerGroup @structures_hd hits 500 downloads! bit.ly/3OSyVNp #machinelearning #PDEs #statphys #compchem #HPC #AI #fluids #dynamicalsystems #quantum

Which network architectures capture the properties of quantum systems optimally? We systematically compare different NQS ansatz functions on benchmark problems and identify the details of symmetrization as a key to better performance: arxiv.org/abs/2301.06788

Happy to see our work published in MLST!

Our work on localization in a spatially disordered, long-range interacting Heisenberg XXZ spin system got published in PRB! Here is a small blog with an overview of the results (and a bonus gif): mbqd.de/post/2022-pair… Paper: journals.aps.org/prb/abstract/1…