Author

Shohei Kiryu

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Preprint Sep 2026

Efficient Simulation of Hybrid Continuous- and Discrete-Variable Quantum Circuits via Gaussian Decompositions

Hybrid quantum systems combining discrete-variable (DV) and continuous-variable (CV) subsystems arise across a broad range of physical platforms and enable quantum information processing beyond purely qubit-based designs. Their classical simulation, however, is challenging since computational costs of both CV and DV sy...

Kazufumi Tanji, Dot Belin Pio, Shohei Kiryu et al. · 0 citations

Preprint Sep 2026

Constant-rate quantum codes with low-weight stabilizers and full logical Clifford actions via transversal and fold-transversal gates

Low-space-overhead fault-tolerant quantum computation requires not only high-rate quantum error-correcting codes but also space-efficient implementations of logical operations. Transversal and fold-transversal gates are promising since they limit error propagation and require no additional qubits. However, the logical...

Takaya Matsuura, Yohji Chin, Shohei Kiryu et al. · 1 citation

Preprint Aug 2026

Fundamental limits of parameter estimation with heralded optical non-Gaussian states generated from Gaussian resources

Non-Gaussian states can exhibit large quantum Fisher information (QFI) in quantum sensing. In optical systems, however, its generation is often probabilistic via the boson-sampling type conditional operation and thus its generation rate is limited. This probabilistic generation of non-Gaussian resource should be taken...

Shohei Kiryu, Kazufumi Tanji, Y. Ueda et al. · 0 citations