Zobrazeno 1 - 10
of 130
pro vyhledávání: '"Kosugi, Taichi"'
In this paper, we propose a quantum algorithm for solving the linear advection-diffusion equation by employing a new approximate probabilistic imaginary-time evolution (PITE) operator which improves the existing approximate PITE. First, the effective
Externí odkaz:
http://arxiv.org/abs/2409.18559
Autor:
Couzinie, Yannick, Seki, Yuya, Nishiya, Yusuke, Nishi, Hirofumi, Kosugi, Taichi, Tanaka, Shu, Matsushita, Yu-ichiro
This study investigates the application of Factorization Machines with Quantum Annealing (FMQA) to address the crystal structure problem (CSP) in materials science. FMQA is a black-box optimization algorithm that combines machine learning with anneal
Externí odkaz:
http://arxiv.org/abs/2408.03556
In this article, we compare the methods implementing the real-time evolution operator generated by a unitary diagonal matrix where its entries obey a known underlying real function. When the size of the unitary diagonal matrix is small, a well-known
Externí odkaz:
http://arxiv.org/abs/2407.16345
In this study, we propose a quantum-classical hybrid scheme for performing orbital-free density functional theory (OFDFT) using probabilistic imaginary-time evolution (PITE), designed for the era of fault-tolerant quantum computers (FTQC), as a mater
Externí odkaz:
http://arxiv.org/abs/2407.16191
Autor:
Nishi, Hirofumi, Takei, Yuki, Kosugi, Taichi, Mieda, Shunsuke, Natsume, Yutaka, Aoyagi, Takeshi, Matsushita, Yu-ichiro
In this study, we employed a quantum computer to solve a low-energy effective Hamiltonian for spin defects in diamond (so-called NV centre) and wurtzite-type aluminium nitride, which are anticipated to be qubits. The probabilistic imaginary-time evol
Externí odkaz:
http://arxiv.org/abs/2407.10555
One of the crucial generic techniques for quantum computation is amplitude encoding. Although several approaches have been proposed, each of them often requires exponential classical-computational cost or an oracle whose explicit construction is not
Externí odkaz:
http://arxiv.org/abs/2404.18529
Publikováno v:
J. Phys. Soc. Jpn., Vol.93, No.5, 2024, Article ID: 054002
During the noisy intermediate-scale quantum (NISQ) era, it is important to optimize the quantum circuits in circuit depth and gate count, especially entanglement gates, including the CNOT gate. Among all the unitary operators, diagonal unitary matric
Externí odkaz:
http://arxiv.org/abs/2310.06676
Publikováno v:
Phys. Rev. A 109, 022423 (2024)
We propose a novel adiabatic time evolution (ATE) method for obtaining the ground state of a quantum many-electron system on a quantum circuit based on first quantization. As a striking feature of the ATE method, it consists of only unitary operation
Externí odkaz:
http://arxiv.org/abs/2309.03529
For quantum state preparation, a non-unitary operator is typically designed to decay undesirable states contained in an initial state using ancilla qubits and a probabilistic action. Probabilistic algorithms do not accelerate the computational proces
Externí odkaz:
http://arxiv.org/abs/2308.03605
Autor:
Couzinie, Yannick, Nishiya, Yusuke, Nishi, Hirofumi, Kosugi, Taichi, Nishimori, Hidetoshi, Matsushita, Yu-ichiro
Publikováno v:
Phys. Rev. A 109, 032416, 15 March 2024
We propose an annealing scheme usable on modern Ising machines for crystal structures prediction (CSP) by taking into account the general n-body atomic interactions, and in particular three-body interactions which are necessary to simulate covalent b
Externí odkaz:
http://arxiv.org/abs/2307.03123