50 citations · 218 across the 16 of their papers we have counts for
17 papers
Circuit growth and subspace read-out in quantum-selected configuration interaction: Separating the Hartree-Fock determinant
Ayaka Fujimoto, Norifumi Matsumoto, Shota Kanasugi +2
Predicting many molecular properties requires accurate ground-state energies of molecular Hamiltonians. Quantum-selected configuration interaction (QSCI) obtains such energies by m…
Enabling Chemically Accurate Quantum Phase Estimation in the Early Fault-Tolerant Regime
Shota Kanasugi, Riki Toshio, Kazunori Maruyama +1
Quantum simulation of molecular electronic structure is one of the most promising applications of quantum computing. However, achieving chemically accurate predictions for strongly…
STAR-Magic Mutation: Even More Efficient Analog Rotation Gates for Early Fault-Tolerant Quantum Computer
Riki Toshio, Shota Kanasugi, Jun Fujisaki +3
We introduce STAR-magic mutation, an efficient protocol for implementing logical rotation gates on early fault-tolerant quantum computers. This protocol judiciously combines two of…
Mirror subspace diagonalization: A real-time quantum Krylov algorithm with near-optimal sampling cost
Shota Kanasugi, Yuya O. Nakagawa, Norifumi Matsumoto +3
Quantum Krylov algorithms are a promising approach for ground-state energy estimation on near-term quantum computers. However, their sampling cost is inherently high because each H…
Fast-forwardability of Qubit-mapped Fermion models based on Cartan decomposition
Yuichiro Hidaka, Shoichiro Tsutsui, Shota Kanasugi +3
We study the Hamiltonian algebra of qubit-mapped interacting fermion models and their fast-forwardability. We prove that the dimension of the Hamiltonian algebra of the fermion mod…
Quantum many-body simulation of finite-temperature systems with sampling a series expansion of a quantum imaginary-time evolution
Norifumi Matsumoto, Shoichiro Tsutsui, Yuya O. Nakagawa +5
Simulating thermal-equilibrium properties at finite temperature is crucial for studying quantum many-body systems. Quantum computers are expected to enable us to simulate large sys…
Subspace-Based Local Compilation of Variational Quantum Circuits for Large-Scale Quantum Many-Body Simulation
Shota Kanasugi, Yuichiro Hidaka, Yuya O. Nakagawa +5
Simulation of quantum many-body systems is a promising application of quantum computers. However, implementing the time-evolution operator as a quantum circuit efficiently on near-…
Computation of Green's function by local variational quantum compilation
Shota Kanasugi, Shoichiro Tsutsui, Yuya O. Nakagawa +3
Computation of the Green's function is crucial to study the properties of quantum many-body systems such as strongly correlated systems. Although the high-precision calculation of…
Piezoelectric effect and diode effect in anapole and monopole superconductors
Michiya Chazono, Shota Kanasugi, Taisei Kitamura +1
Superconductors lacking both inversion symmetry and time-reversal symmetry have been attracting much attention as a platform for exotic superconducting phases and anomalous phenome…
Quantum-geometry-induced anapole superconductivity
Taisei Kitamura, Shota Kanasugi, Michiya Chazono +1
Anapole superconductivity recently proposed for multiband superconductors Commun. Phys. , 39\ (2022) (at https://www.nature.com/articles/s42005-022-00804-7) is a key feature…
Anapole superconductivity from -symmetric mixed-parity interband pairing
Shota Kanasugi, Youichi Yanase
Recently, superconductivity with spontaneous time-reversal or parity symmetry breaking is attracting much attention owing to its exotic properties, such as nontrivial topology and…
Ferroelectricity-induced multiorbital odd-frequency superconductivity in SrTiO
Shota Kanasugi, Dushko Kuzmanovski, Alexander V. Balatsky +1
We demonstrate that SrTiO can be a platform for observing the bulk odd-frequency superconducting state owing to the multiorbital/multiband nature. We consider a three-orbital t…
Multiple odd-parity superconducting phases in bilayer transition metal dichalcogenides
Shota Kanasugi, Youichi Yanase
We study unconventional superconductivity in a two-dimensional locally noncentrosymmetric triangular lattice. The model is relevant to bilayer transition metal dichalcogenides with…
Multiorbital Ferroelectric Superconductivity in doped SrTiO3
Shota Kanasugi, Youichi Yanase
SrTiO is a unique example of a system which exhibits both quantum paraelectricity and superconductivity. Thus, it is expected that the superconducting state is closely related…
Spin-orbit-coupled ferroelectric superconductivity
Shota Kanasugi, Youichi Yanase
Motivated by recent studies on ferroelectric-like order coexisting with metallicity, we investigate ferroelectric (FE) superconductivity in which a FE-like structural phase transit…
Optically Induced Nuclear Spin Polarization in the Quantum Hall Regime: The Effect of Electron Spin Polarization through Exciton and Trion Excitations
K. Akiba, S. Kanasugi, T. Yuge +2
We study nuclear spin polarization in the quantum Hall regime through the optically pumped electron spin polarization in the lowest Landau level. The nuclear spin polarization is m…
Optically induced nuclear spin polarization in a single GaAs/AlGaAs quantum well probed by a resistance detection method in the fractional quantum Hall regime
K. Akiba, T. Yuge, S. Kanasugi +2
We study the optically pumped nuclear spin polarization in a single GaAs/AlGaAs quantum well in the quantum Hall system. We apply resistive detection via the contact hyperfine inte…