6 papers
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…
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…
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…
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…
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…
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…