184 citations · 934 across the 51 of their papers we have counts for
4 papers · 2 filters
Accelerated spin-adapted ground state preparation with non-variational quantum algorithms
Takumi Kobori, Taichi Kosugi, Hirofumi Nishi +2
Various methods have been explored to prepare the spin-adapted ground state, the lowest energy state within the Hilbert space constrained by externally specified values of the tota…
Quantum State Readout via Overlap-Based Feature Extraction
Hirofumi Nishi, Taichi Kosugi, Xinchi Huang +3
In this study, a method for quantum state readout and feature extraction is developed using quantum-overlap-based fitting of function expansions. The approach involves the quantum…
Demonstration of logical quantum phase estimation for X-ray absorption spectra
Hirofumi Nishi, Taichi Kosugi, Satoshi Hirose +2
In this study, we employed Fourier-based quantum phase estimation (QPE) to calculate X-ray absorption spectroscopy (XAS) spectra. The primary focus of this study is the calculation…
Tensor decomposition technique for qubit encoding of maximal-fidelity Lorentzian orbitals in real-space quantum chemistry
Taichi Kosugi, Xinchi Huang, Hirofumi Nishi +1
To simulate the real- and imaginary-time evolution of a many-electron system on a quantum computer based on the first-quantized formalism, we need to encode molecular orbitals (MOs…