activity
20242026
collaborators

6 papers

quant-ph2026

Quantum signal processing in Hilbert space fragmented systems

Naoya Egawa, Kaoru Mizuta, Joji Nasu

Quantum signal processing (QSP), originally developed for composite pulse sequences in nuclear magnetic resonance systems, has recently attracted attention as a unified framework f…

quant-ph2026

On the commutator scaling in Hamiltonian simulation with multi-product formulas

Kaoru Mizuta

A multi-product formula (MPF) is a promising approach for Hamiltonian simulation efficiently both in the system size and the inverse allowable error by combinin…

quant-ph2025

Explicit error bounds with commutator scaling for time-dependent product and multi-product formulas

Kaoru Mizuta, Tatsuhiko N. Ikeda, Keisuke Fujii

Product formula (PF), which approximates the time evolution under a many-body Hamiltonian by the product of local time evolution operators, is one of the central approaches for sim…

quant-ph2025

Trotterization is substantially efficient for low-energy states

Kaoru Mizuta, Tomotaka Kuwahara

Trotterization is one of the central approaches for simulating quantum many-body dynamics on quantum computers or tensor networks. In addition to its simple implementation, recent…

cond-mat.stat-mech2024

Controlling discrete time crystals via single-site operations in zero-field diamond quantum simulators

Naoya Egawa, Kaoru Mizuta, Joji Nasu

Discrete time crystals (DTCs) have emerged as novel nonequilibrium phases of matter that spontaneously break discrete time-translation symmetry in periodically driven systems. Rigo…

quant-ph2024

Comment on "Multivariable quantum signal processing (M-QSP): prophecies of the two-headed oracle"

Hitomi Mori, Kaoru Mizuta, Keisuke Fujii

Multivariable Quantum Signal Processing (M-QSP) [1] is expected to provide an efficient means to handle polynomial transformations of multiple variables simultaneously. However, we…