collaborators

6 papers

quant-ph2026

Assessing non-Gaussian quantum state conversion with the stellar rank

Oliver Hahn, Maxime Garnier, Giulia Ferrini +2

State conversion is a fundamental task in quantum information processing. Quantum resource theories allow for analyzing and bounding conversions that use restricted sets of operati…

quant-ph2026

Weak distillation of quantum resources

Shinnosuke Onishi, Oliver Hahn, Ryuji Takagi

Importance sampling based on quasi-probability decomposition is the backbone of many widely used techniques, such as error mitigation, circuit knitting, and, more generally, virtua…

quant-ph2026

Classical simulation and quantum resource theory of non-Gaussian optics

Oliver Hahn, Ryuji Takagi, Giulia Ferrini +1

We propose efficient algorithms for classically simulating Gaussian unitaries and measurements applied to non-Gaussian initial states. The constructions are based on decomposing th…

quant-ph2025

Classical simulation of circuits with realistic odd-dimensional Gottesman-Kitaev-Preskill states

Cameron Calcluth, Oliver Hahn, Juani Bermejo-Vega +2

Classically simulating circuits with bosonic codes is challenging due to the prohibitive cost of simulating quantum systems with many, possibly infinite, energy levels. We propose…

quant-ph2025

Measuring non-Gaussianity with Correlation

Oliver Hahn, Ryuji Takagi

Quantum non-Gaussianity is a key resource for quantum advantage in continuous-variable systems. We introduce a general framework to quantify non-Gaussianity based on correlation ge…

quant-ph2025

Bridging magic and non-Gaussian resources via Gottesman-Kitaev-Preskill encoding

Oliver Hahn, Giulia Ferrini, Ryuji Takagi

Although the similarity between non-stabilizer states -- also known as magic states -- in discrete-variable systems and non-Gaussian states in continuous-variable systems has widel…