193 citations · 886 across the 25 of their papers we have counts for
25 papers
SU(4) gate design via unitary process tomography: its application to cross-resonance based superconducting quantum devices
Michihiko Sugawara, Takahiko Satoh
We present a novel approach for implementing pulse-efficient SU(4) gates on cross resonance (CR)-based superconducting quantum devices. Our method introduces a parameterized unitar…
Digital quantum simulator for the time-dependent Dirac equation using discrete-time quantum walks
Shigetora Miyashita, Takahiko Satoh, Michihiko Sugawara +5
We introduce a quantum algorithm for simulating the time-dependent Dirac equation in 3+1 dimensions using discrete-time quantum walks. Thus far, promising quantum algorithms have b…
Leveraging hardware-control imperfections for error mitigation via generalized quantum subspace
Yasuhiro Ohkura, Suguru Endo, Takahiko Satoh +2
In the era of quantum computing without full fault-tolerance, it is essential to suppress noise effects via the quantum error mitigation techniques to enhance the computational pow…
Amplitude Amplification for Optimization via Subdivided Phase Oracle
Naphan Benchasattabuse, Takahiko Satoh, Michal Hajdušek +1
We propose an algorithm using a modified variant of amplitude amplification to solve combinatorial optimization problems via the use of a subdivided phase oracle. Instead of dividi…
Simultaneous execution of quantum circuits on current and near-future NISQ systems
Yasuhiro Ohkura, Takahiko Satoh, Rodney Van Meter
In the NISQ era, multi-programming of quantum circuits (QC) helps to improve the throughput of quantum computation. Although the crosstalk, which is a major source of noise on NISQ…
QuISP: a Quantum Internet Simulation Package
Ryosuke Satoh, Michal Hajdušek, Naphan Benchasattabuse +7
We present an event-driven simulation package called QuISP for large-scale quantum networks built on top of the OMNeT++ discrete event simulation framework. Although the behavior o…
A Quantum Internet Architecture
Rodney Van Meter, Ryosuke Satoh, Naphan Benchasattabuse +5
Entangled quantum communication is advancing rapidly, with laboratory and metropolitan testbeds under development, but to date there is no unifying Quantum Internet architecture. W…
Grover search revisited; application to image pattern matching
Hiroyuki Tezuka, Kouhei Nakaji, Takahiko Satoh +1
The landmark Grover algorithm for amplitude amplification serves as an essential subroutine in various type of quantum algorithms, with guaranteed quantum speedup in query complexi…
Quantum-gate decomposer
Ken M. Nakanishi, Takahiko Satoh, Synge Todo
Efficient decompositions of multi-qubit gates are essential in NISQ applications, where the number of gates or the circuit depth is limited. This paper presents efficient decomposi…
Graph kernels encoding features of all subgraphs by quantum superposition
Kaito Kishi, Takahiko Satoh, Rudy Raymond +2
Graph kernels are often used in bioinformatics and network applications to measure the similarity between graphs; therefore, they may be used to construct efficient graph classifie…
Pulse-engineered Controlled-V gate and its applications on superconducting quantum device
Takahiko Satoh, Shun Oomura, Michihiko Sugawara +1
In this paper, we demonstrate that, by employing OpenPulse design kit for IBM superconducting quantum devices, the controlled-V gate (CV gate) can be implemented in about half the…
Efficient Construction of a Control Modular Adder on a Carry-Lookahead Adder Using Relative-phase Toffoli Gates
Kento Oonishi, Tomoki Tanaka, Shumpei Uno +3
Control modular addition is a core arithmetic function, and we must consider the computational cost for actual quantum computers to realize efficient implementation. To achieve a l…
Attacking the Quantum Internet
Takahiko Satoh, Shota Nagayama, Shigeya Suzuki +3
The main service provided by the coming Quantum Internet will be creating entanglement between any two quantum nodes. We discuss and classify attacks on quantum repeaters, which wi…
Subdivided Phase Oracle for NISQ Search Algorithms
Takahiko Satoh, Yasuhiro Ohkura, Rodney Van Meter
Because noisy, intermediate-scale quantum (NISQ) machines accumulate errors quickly, we need new approaches to designing NISQ-aware algorithms and assessing their performance. Algo…
Modeling of Measurement-based Quantum Network Coding on IBM Q Experience Devices
Poramet Pathumsoot, Takaaki Matsuo, Takahiko Satoh +3
Quantum network coding has been proposed to improve resource utilization to support distributed computation but has not yet been put in to practice. We investigate a particular imp…
Extracting Success from IBM's 20-Qubit Machines Using Error-Aware Compilation
Shin Nishio, Yulu Pan, Takahiko Satoh +2
NISQ (Noisy, Intermediate-Scale Quantum) computing requires error mitigation to achieve meaningful computation. Our compilation tool development focuses on the fact that the error…
Analysis of Measurement-based Quantum Network Coding over Repeater Networks under Noisy Conditions
Takaaki Matsuo, Takahiko Satoh, Shota Nagayama +1
Quantum network coding is an effective solution for alleviating bottlenecks in quantum networks. We introduce a measurement-based quantum network coding scheme for quantum repeater…
Optimizing Timing of High-Success-Probability Quantum Repeaters
Rodney Van Meter, Takahiko Satoh, Shota Nagayama +2
Optimizing a connection through a quantum repeater network requires careful attention to the photon propagation direction of the individual links, the arrangement of those links in…
The Network Impact of Hijacking a Quantum Repeater
Takahiko Satoh, Shota Nagayama, Rodney Van Meter
In quantum networking, repeater hijacking menaces the security and utility of quantum applications. To deal with this problem, it is important to take a measure of the impact of qu…
State injection, lattice surgery and dense packing of the deformation-based surface code
Shota Nagayama, Takahiko Satoh, Rodney Van Meter
Resource consumption of the conventional surface code is expensive, in part due to the need to separate the defects that create the logical qubit far apart on the physical qubit la…
Analysis of Quantum Network Coding for Realistic Repeater Networks
Takahiko Satoh, Kaori Ishizaki, Shota Nagayama +1
Quantum repeater networks have attracted attention for the implementation of long-distance and large-scale sharing of quantum states. Recently, researchers extended classical netwo…
Ising interaction between capacitively-coupled superconducting flux qubits
Takahiko Satoh, Yuichiro Matsuzaki, Kosuke Kakuyanagi +3
Here, we propose a scheme to generate a controllable Ising interaction between superconducting flux qubits. Existing schemes rely on inducting couplings to realize Ising interactio…
Scalable quantum computation architecture using always-on Ising interactions via quantum feedforward
Takahiko Satoh, Yuichiro Matsuzaki, Kosuke Kakuyanagi +4
Here, we propose a way to control the interaction between qubits with always-on Ising interaction. Unlike the standard method to change the interaction strength with unitary operat…
Path Selection for Quantum Repeater Networks
Rodney Van Meter, Takahiko Satoh, Thaddeus D. Ladd +2
Quantum networks will support long-distance quantum key distribution (QKD) and distributed quantum computation, and are an active area of both experimental and theoretical research…