139 citations · 379 across the 11 of their papers we have counts for
11 papers
Q3DE: A fault-tolerant quantum computer architecture for multi-bit burst errors by cosmic rays
Yasunari Suzuki, Takanori Sugiyama, Tomochika Arai +3
Demonstrating small error rates by integrating quantum error correction (QEC) into an architecture of quantum computing is the next milestone towards scalable fault-tolerant quantu…
Efficient tomography of microwave photonic cluster states
Yoshiki Sunada, Shingo Kono, Jesper Ilves +6
Entanglement among a large number of qubits is a crucial resource for many quantum algorithms. Such many-body states have been efficiently generated by entangling a chain of itiner…
Fast readout and reset of a superconducting qubit coupled to a resonator with an intrinsic Purcell filter
Yoshiki Sunada, Shingo Kono, Jesper Ilves +4
Coupling a resonator to a superconducting qubit enables various operations on the qubit, including dispersive readout and unconditional reset. The speed of these operations is limi…
Fast parametric two-qubit gates with suppressed residual interaction using a parity-violated superconducting qubit
Atsushi Noguchi, Alto Osada, Shumpei Masuda +7
We demonstrate fast two-qubit gates using a parity-violated superconducting qubit consisting of a capacitively-shunted asymmetric Josephson-junction loop under a finite magnetic fl…
Quantum remote sensing with asymmetric information gain
Yuki Takeuchi, Yuichiro Matsuzaki, Koichiro Miyanishi +2
Typically, the aim of quantum metrology is to sense target fields with high precision utilizing quantum properties. Unlike the typical aim, in this paper, we use quantum properties…
Reliable Characterization for Improving and Validating Accurate Quantum Operations
Takanori Sugiyama, Shinpei Imori, Fuyuhiko Tanaka
A reliable method for characterizing quantum operations that is suitable for improving and validating their accuracies is indispensable for realizing a practical quantum computer.…
Precision-Guaranteed Quantum Metrology
Takanori Sugiyama
Quantum metrology is a general term for methods to precisely estimate the value of an unknown parameter by actively using quantum resources. In particular, some classes of entangle…
Precision-guaranteed quantum tomography
Takanori Sugiyama, Peter S. Turner, Mio Murao
Quantum state tomography is the standard tool in current experiments for verifying that a state prepared in the lab is close to an ideal target state, but up to now there were no r…
Effect of nonnegativity on estimation errors in one-qubit state tomography with finite data
Takanori Sugiyama, Peter S. Turner, Mio Murao
We analyze the behavior of estimation errors evaluated by two loss functions, the Hilbert-Schmidt distance and infidelity, in one-qubit state tomography with finite data. We show n…
Adaptive experimental design for one-qubit state estimation with finite data based on a statistical update criterion
Takanori Sugiyama, Peter S. Turner, Mio Murao
We consider 1-qubit mixed quantum state estimation by adaptively updating measurements according to previously obtained outcomes and measurement settings. Updates are determined by…
Error probability analysis in quantum tomography: a tool for evaluating experiments
Takanori Sugiyama, Peter S. Turner, Mio Murao
We expand the scope of the statistical notion of error probability, i.e., how often large deviations are observed in an experiment, in order to make it directly applicable to quant…