Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Wada, Kaito"'
Autor:
Kurogi, Hiroyoshi, Endo, Katsuhiro, Sato, Yuki, Sugawara, Michihiko, Wada, Kaito, Sugisaki, Kenji, Kanno, Shu, Watanabe, Hiroshi C., Nakano, Haruyuki
In variational algorithms, quantum circuits are conventionally parametrized with respect to single-qubit gates. In this study, we parameterize a generalized controlled gate and propose an algorithm to estimate the optimal parameters for locally minim
Externí odkaz:
http://arxiv.org/abs/2409.13547
In quantum mechanics, measuring the expectation value of a general observable has an inherent statistical uncertainty that is quantified by variance or mean squared error of measurement outcome. While the uncertainty can be reduced by averaging sever
Externí odkaz:
http://arxiv.org/abs/2406.03306
In quantum computation, amplitude estimation is a fundamental subroutine that is utilized in various quantum algorithms. A general important task of such estimation problems is to characterize the estimation lower bound, which is referred to as quant
Externí odkaz:
http://arxiv.org/abs/2405.15174
Quantum algorithms are still challenging to solve linear systems of equations on real devices. This challenge arises from the need for deep circuits and numerous ancilla qubits. We introduce the quantum conjugate gradient (QCG) method using the quant
Externí odkaz:
http://arxiv.org/abs/2404.02713
A restriction in the quality and quantity of available qubits presents a substantial obstacle to the application of near-term and early fault-tolerant quantum computers in practical tasks. To confront this challenge, some techniques for effectively a
Externí odkaz:
http://arxiv.org/abs/2303.07340
Autor:
Endo, Katsuhiro, Sato, Yuki, Raymond, Rudy, Wada, Kaito, Yamamoto, Naoki, Watanabe, Hiroshi C.
Publikováno v:
Physical Review Research 5 (4), 043136, (2023)
Variational Quantum Eigensolver (VQE) is a hybrid algorithm for finding the minimum eigenvalue/vector of a given Hamiltonian by optimizing a parametrized quantum circuit (PQC) using a classical computer. Sequential optimization methods, which are oft
Externí odkaz:
http://arxiv.org/abs/2303.07082
Autor:
Sato, Yuki, Watanabe, Hiroshi C., Raymond, Rudy, Kondo, Ruho, Wada, Kaito, Endo, Katsuhiro, Sugawara, Michihiko, Yamamoto, Naoki
Publikováno v:
Physical Review A, 108 (2), 022429 (2023)
Generalized eigenvalue problems (GEPs) play an important role in the variety of fields including engineering, machine learning and quantum chemistry. Especially, many problems in these fields can be reduced to finding the minimum or maximum eigenvalu
Externí odkaz:
http://arxiv.org/abs/2302.12602
Publikováno v:
Quantum 8, 1463 (2024)
Quantum-enhanced (i.e., higher performance by quantum effects than any classical methods) mean value estimation of observables is a fundamental task in various quantum technologies; in particular, it is an essential subroutine in quantum computing al
Externí odkaz:
http://arxiv.org/abs/2210.15624
Publikováno v:
Quantum Science and Technology, 9, 035030, (2024)
We propose an algorithm for variational quantum algorithms (VQAs) to optimize the structure of parameterized quantum circuits (PQCs) efficiently. The algorithm optimizes the PQC structure on-the-fly in VQA by sequentially replacing a single-qubit gat
Externí odkaz:
http://arxiv.org/abs/2209.08535
Autor:
Wada, Kaito, Raymond, Rudy, Ohnishi, Yu-ya, Kaminishi, Eriko, Sugawara, Michihiko, Yamamoto, Naoki, Watanabe, Hiroshi C.
Publikováno v:
Physical Review A, 105 (6), 062421 (2022)
We propose a novel method to sequentially optimize arbitrary single-qubit gates in parameterized quantum circuits for simulating real and imaginary time evolution. The method utilizes full degrees of freedom of single-qubit gates and therefore can po
Externí odkaz:
http://arxiv.org/abs/2111.05538