318 citations · 816 across the 27 of their papers we have counts for
27 papers
Addressing requirements for crosstalk-free quantum-gate operation in many-body nanofiber cavity QED systems
Tim Keller, Seigo Kikura, Rui Asaoka +3
A distributed network architecture in which flying photons connect individual modules containing stationary atomic qubits is a promising approach for scaling up neutral-atom based…
Logical entanglement distribution between distant 2D array qubits
Yuya Maeda, Yasunari Suzuki, Toshiki Kobayashi +3
Sharing logical entangled pairs between distant quantum nodes is a key process to achieve fault tolerant quantum computation and communication. However, there is a gap between curr…
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…
Unitary-transformed projective squeezing: applications for circuit-knitting and state-preparation of non-Gaussian states
Keitaro Anai, Yasunari Suzuki, Yuuki Tokunaga +3
Continuous-variable (CV) quantum computing is a promising candidate for quantum computation because it can, even with one mode, utilize infinite-dimensional Hilbert spaces and can…
-Party Hadamard Test for Distributed Quantum Computation
Kaoru Yamamoto, Yuichiro Matsuzaki, Yasunari Suzuki +2
Quantum computers promise computational advantages over classical computers, but hardware-imposed limitations remain a major obstacle. The Hadamard test mitigates these limitations…
MagicPool: Dealing with Magic State Distillation Failures on Large-Scale Fault-Tolerant Quantum Computer
Yutaka Hirano, Yasunari Suzuki, Keisuke Fujii
Magic state distillation, which is a probabilistic process used to generate magic states, plays an important role in universal fault-tolerant quantum computers. On the other hand,…
Projective squeezing for translation symmetric bosonic codes
Suguru Endo, Keitaro Anai, Yuichiro Matsuzaki +2
The design of translation symmetric bosonic codes, e.g., Gottesmann-Kitaev-Preskill and squeezed cat codes, is robust against photon loss, but the computation accuracy is limited b…
Efficient and high-performance routing of lattice-surgery paths on three-dimensional lattice
Kou Hamada, Yasunari Suzuki, Yuuki Tokunaga
Encoding logical qubits with surface codes and performing multi-qubit logical operations with lattice surgery is one of the most promising approaches to demonstrate fault-tolerant…
Density matrix representation of hybrid tensor networks for noisy quantum devices
Hiroyuki Harada, Yasunari Suzuki, Bo Yang +2
The hybrid tensor network (HTN) method is a general framework allowing for the construction of an effective wavefunction with the combination of classical tensors and quantum tenso…
Efficient Simulation of Leakage Errors in Quantum Error Correcting Codes Using Tensor Network Methods
Hidetaka Manabe, Yasunari Suzuki, Andrew S. Darmawan
Leakage errors, in which a qubit is excited to a level outside the qubit subspace, represent a significant obstacle in the development of robust quantum computers. We present a com…
Experimental demonstration of a high-fidelity virtual two-qubit gate
Akhil Pratap Singh, Kosuke Mitarai, Yasunari Suzuki +4
We experimentally demonstrate a virtual two-qubit gate and characterize it using quantum process tomography~(QPT). The virtual two-qubit gate decomposes an actual two-qubit gate in…
Virtual quantum error detection
Kento Tsubouchi, Yasunari Suzuki, Yuuki Tokunaga +2
Quantum error correction and quantum error detection necessitate syndrome measurements to detect errors. Performing syndrome measurements for each stabilizer generator can be a sig…
Quantum error mitigation for rotation symmetric bosonic codes with symmetry expansion
Suguru Endo, Yasunari Suzuki, Kento Tsubouchi +4
The rotation symmetric bosonic code (RSBC) is a unified framework of practical bosonic codes that have rotation symmetries, such as cat codes and binomial codes. While cat codes ac…
Hunting for quantum-classical crossover in condensed matter problems
Nobuyuki Yoshioka, Tsuyoshi Okubo, Yasunari Suzuki +2
The intensive pursuit for quantum advantage in terms of computational complexity has further led to a modernized crucial question: {\it When and how will quantum computers outperfo…
NEO-QEC: Neural Network Enhanced Online Superconducting Decoder for Surface Codes
Yosuke Ueno, Masaaki Kondo, Masamitsu Tanaka +2
Quantum error correction (QEC) is essential for quantum computing to mitigate the effect of errors on qubits, and surface code (SC) is one of the most promising QEC methods. Decodi…
Characterizing quantum pseudorandomness by machine learning
Masahiro Fujii, Ryosuke Kutsuzawa, Yasunari Suzuki +2
Random dynamics in isolated quantum systems is of practical use in quantum information and is of theoretical interest in fundamental physics. Despite a large number of theoretical…
Generalized quantum subspace expansion
Nobuyuki Yoshioka, Hideaki Hakoshima, Yuichiro Matsuzaki +3
One of the major challenges for erroneous quantum computers is undoubtedly the control over the effect of noise. Considering the rapid growth of available quantum resources that ar…
Quantum algorithm for calculation of transition amplitudes in hybrid tensor networks
Shu Kanno, Suguru Endo, Yasunari Suzuki +1
The hybrid tensor network approach allows us to perform calculations on systems larger than the scale of a quantum computer. However, when calculating transition amplitudes, there…
QECOOL: On-Line Quantum Error Correction with a Superconducting Decoder for Surface Code
Yosuke Ueno, Masaaki Kondo, Masamitsu Tanaka +2
Due to the low error tolerance of a qubit, detecting and correcting errors on it is essential for fault-tolerant quantum computing. Surface code (SC) associated with its decoding a…
Quantum circuits for exact unitary -designs and applications to higher-order randomized benchmarking
Yoshifumi Nakata, Da Zhao, Takayuki Okuda +9
A unitary -design is a powerful tool in quantum information science and fundamental physics. Despite its usefulness, only approximate implementations were known for general .…
Quadratic Clifford expansion for efficient benchmarking and initialization of variational quantum algorithms
Kosuke Mitarai, Yasunari Suzuki, Wataru Mizukami +2
Variational quantum algorithms are considered to be appealing applications of near-term quantum computers. However, it has been unclear whether they can outperform classical algori…
Qulacs: a fast and versatile quantum circuit simulator for research purpose
Yasunari Suzuki, Yoshiaki Kawase, Yuya Masumura +17
To explore the possibilities of a near-term intermediate-scale quantum algorithm and long-term fault-tolerant quantum computing, a fast and versatile quantum circuit simulator is n…
Quantum error mitigation as a universal error-minimization technique: applications from NISQ to FTQC eras
Yasunari Suzuki, Suguru Endo, Keisuke Fujii +1
In the early years of fault-tolerant quantum computing (FTQC), it is expected that the available code distance and the number of magic states will be restricted due to the limited…
Subspace Variational Quantum Simulator
Kentaro Heya, Ken M Nakanishi, Kosuke Mitarai +8
Quantum simulation is one of the key applications of quantum computing, which accelerates research and development in the fields such as chemistry and material science. The recent…