6 papers
Do Not Let CNOTs Overwhelm the Decoder: Scheduling Transversal Gates for Fast FTQC
Shota Ikari, Yuga Hirai, Yasunari Suzuki +2
Transversal CNOT (TCNOT) gates can accelerate fault-tolerant quantum computation (FTQC) in the surface code by reducing the number of syndrome extraction rounds required between lo…
No More Hooks in the Surface Code: Distance-Preserving Syndrome Extraction for Arbitrary Layouts at Minimum Depth
Yuga Hirai, Shota Ikari, Yosuke Ueno +1
Hook errors are a major challenge in implementing logical operations with the surface code, because they can reduce the fault distance below the code distance. This motivates syndr…
Accelerating BP-based decoders for QLDPC Codes with Local Syndrome-Based Preprocessing
Wenxuan Fan, Yasunari Suzuki, Gokul Subramanian Ravi +4
Due to the high error rate of qubits, detecting and correcting errors is essential for achieving fault-tolerant quantum computing (FTQC). Quantum low-density parity-check (QLDPC) c…
A Spacetime Volume Implementation of a Logical S Gate in the Surface Code
Yuga Hirai, Shota Ikari, Yosuke Ueno +1
The logical S gate implemented via twist defect braiding in the surface code is one of the major sources of overhead in fault-tolerant quantum computing, since an S-gate correction…
LSQCA: Resource-Efficient Load/Store Architecture for Limited-Scale Fault-Tolerant Quantum Computing
Takumi Kobori, Yasunari Suzuki, Yosuke Ueno +3
Current fault-tolerant quantum computer (FTQC) architectures utilize several encoding techniques to enable reliable logical operations with restricted qubit connectivity. However,…
High-Performance and Scalable Fault-Tolerant Quantum Computation with Lattice Surgery on a 2.5D Architecture
Yosuke Ueno, Taku Saito, Teruo Tanimoto +4
Due to the high error rate of a qubit, detecting and correcting errors on it is essential for fault-tolerant quantum computing (FTQC). Among several FTQC techniques, lattice surger…