11 papers
Qubit Loss Inference with Stabilizer Codes without Leakage Detection Units
Shin Nishio, Takeaki Uno, Fumiyoshi Kobayashi +2
Qubit loss occurs when the physical carrier of a qubit leaves the computational system without directly revealing the event's location. Such errors are a major obstacle to fault-to…
A Neutral-Atom Quantum Compiler with Application-Specific Layout and Hub-Assisted Shuttling
Takahiko Satoh, Takaharu Yoshida
Compiling arbitrary-connectivity NISQ circuits onto monolithic single-zone neutral-atom devices is constrained by a finite interaction range and a minimum separation between simult…
Treewidth-Aware Gate Cut Selection for Reducing Transpilation Overhead on Superconducting Quantum Devices
Hana Ebi, Shin Nishio, Takahiko Satoh
On superconducting quantum devices with sparse qubit connectivity, transpilation of long-range two-qubit interactions inserts additional SWAP gates, increasing hardware cost and ex…
QuBridge: Layer-wise Fidelity Decomposition in Quantum Computation Pipeline
Kisho Sotokawa, Hideaki Kawaguchi, Shin Nishio +1
Running a quantum circuit on current hardware involves a sequence of engineering decisions, each with tunable parameters and distinct error characteristics. Existing tools optimize…
Digital Annealer-Assisted CNOT Oriented Quantum Circuit Transpilation with Integrated QUBO Mapping and Routing
Kazuma Watanabe, Hideaki Kawaguchi, Shin Nishio +1
Limited qubit counts and two-qubit gate errors motivate reducing CNOT overhead in noisy intermediate-scale quantum (NISQ) transpilation. In circuit-partitioning workflows, repeated…
Applicability and Limitations of Quantum Circuit Cutting in Classical State-Vector Simulation
Mitsuhiro Matsumoto, Shinichiro Sanji, Takahiko Satoh
Circuit cutting partitions a large quantum circuit into smaller subcircuits that can be executed independently and recombined by classical post-processing. In classical state-vecto…
Practical Quantum Federated Learning for Privacy-Sensitive Healthcare: Communication Efficiency and Noise Resilience
Suzukaze Kamei, Hideaki Kawaguchi, Takahiko Satoh
AI-driven medical diagnostics increasingly requires collaborative model training across institutions, yet centralizing patient data conflicts with privacy regulations. Federated Le…
Telemetry-Based Server Selection in the Quantum Internet via Cross-Layer Runtime Estimation
Masaki Nagai, Hideaki Kawaguchi, Shin Nishio +1
The Quantum Internet will allow clients to delegate quantum workloads to remote servers over heterogeneous networks, but choosing the server that minimizes end-to-end execution tim…
RuleSet Generation Framework for Application Layer Integration in Quantum Internet
Rei Kawano, Shin Nishio, Hideaki Kawaguchi +2
Layered architectures for the Quantum Internet have been proposed, inspired by that of the classical Internet, which has demonstrated high maintainability even in large-scale syste…
Dense packing of the surface code: code deformation procedures and hook-error-avoiding gate scheduling
Kohei Fujiu, Shota Nagayama, Shin Nishio +2
The surface code is one of the leading quantum error correction codes for realizing large-scale fault-tolerant quantum computing (FTQC). One major challenge in realizing surface-co…
Enhancing the Dynamic Range of Quantum Sensing via Quantum Circuit Learning
Hideaki Kawaguchi, Yuichiro Mori, Takahiko Satoh +1
Quantum metrology is a promising application of quantum technologies, enabling the precise measurement of weak external fields at a local scale. In typical quantum sensing protocol…