QuOI Theory
@quoi-theory
We're Quantum Optics & Information: the theory division of TU Wien's Atominstitut. Also with groups for quantum thermo, foundations, computing, and more! We ❤️ open, diverse science + good coffee! Find us at Posts by @tomrivlin.com
New from Philipp in PRA, showing how to perform high-harmonic generation in the classically forbidden region, and produce super-Poissonian photon statistics in so doing. This allows them to test quantum properties of the driving field journals.aps.org/pra/abstract...
In our group we love the Landauer bound on dissipation. So in this new preprint from Jan, Jake, Pharnam, and Marcus, they explore how the cost of erasure can increase when one has access only to finite resources, in both the classical and quantum cases arxiv.org/abs/2607.27341
...And this second one is now out in PRA! journals.aps.org/pra/abstract... bsky.app/profile/quoi...
New preprint from Dani, Marcus, and Alberto: Working out how much work quantum systems do is hard work! In this new work, the team work up the courage to work through a new definition of the quantum work operator arxiv.org/abs/2607.20602
New preprint! Erik, Pharnam, Moha & co. They look at quantum thermometry when the dynamics are non-Markovian, deriving expressions for the Fisher information and the scaling of the precision in this scenario arxiv.org/abs/2607.15978
New in Reports on Progress in Physics by Florian, Marcus, Pauli, and Jake: they develop a self-contained model of a quantum processor without external control, to figure out what thermodynamic resources a quantum computer fundamentally needs to operate iopscience.iop.org/article/10.1...
New in Sciences Advances from Nicky, Florian, Pauli, and Marcus: A new way to characterise high-dimensional, time-frequency entanglement in photons for use in quantum key distribution, all with methods that can use commercial telecom components! www.science.org/doi/10.1126/...
New preprint! Dorian and colleagues make a simple derivation of Wigner's Inequality and a basic quantum optical lab setup to test it, with data to go with it. If you're designing an undergrad program to teach QM and give students an intuition for it, this one's for you! arxiv.org/abs/2606.30255
New preprint! Philipp studies the implications of two-electron effects on the strong-field approximation and look at high-harmonic generation in this context arxiv.org/abs/2606.24765
New preprint! Shuheng looks at the implications for multipartite entanglement in many-body systems of exceptional points arxiv.org/abs/2606.24205
New preprint! Florian and Marcus propose a new, easily-implementable method for certifying entanglement in discrete time bin temporal superposition states arxiv.org/abs/2606.23817
New preprint! Philipp and colleagues show that bright-squeezed-vacuum-driven high-harmonic generation can lead to non-Gaussianity in the resulting states, or to Gaussian entanglement, or to non-classical Gaussian states arxiv.org/abs/2606.22714
New preprint! It's known that measurement error can make certifying quantum effects harder. But here, Simon and colleagues show that it's sometimes possible for an adversary to trick you into seeing entanglement using arbitrarily small errors! arxiv.org/abs/2606.20396
What's better than celebrating a PhD defence? How about THREE? Congrats to Drs (L-R) Umesh, Sohr, and Li for finishing their doctorates (and organising a three-in-a-row defence day!)
New from Philipp: a Rep. Prog. Phys. about attosecond quantum optical interferometry! iopscience.iop.org/article/10.1... See also this write-up in Physics World: physicsworld.com/a/attosecond...
New preprint from Klára and Nico on genuinely multipartite entanglement: they show that all members of a certain kind of Gaussian state are both fully inseparable biseparable, and also GME. This raises the question: are ALL fully inseparable Gaussian states GME? arxiv.org/abs/2605.28404
New preprint! Here, Dorian, Marcus, and Eliza describe how to create a form of entanglement that has both discrete and continuous features in a quantum optical setting arxiv.org/abs/2605.26962
Next, a new preprint from Shuheng looking at how to distinguish between different kinds of non-Gaussian entanglement using our old friend the Schmidt number! arxiv.org/abs/2605.18605
Two new preprints today! First, a first arXiv posting for Bita. The team used a quantum optics setup to detect contextuality with sequential, single-photon measurements, both theoretically and experimentally arxiv.org/abs/2605.18112
New preprint! Dimpi, Shuheng, Giuseppe, and Konrad study the structure of covariance matrices for finite-dimensional position and momentum observables, expanding uncertainty relations to account for more complicated correlation structures arxiv.org/abs/2605.11876
New preprint! Carlos looks at the dynamics of an all-to-all quantum Ising model and finds that it expresses a wide range of behaviours, from integrable to chaotic arxiv.org/abs/2604.14798
New in PRA! Using analytic and numerical methods, Carlos and colleagues study how imperfections in a measuring device impact one's ability to characterise a quantum many-body state journals.aps.org/pra/abstract...
New preprint! Marcus and Nico from our team were involved in this huge roadmap on high-dimensional quantum photonics! arxiv.org/abs/2604.06528