activity
20242026
collaborators

7 papers

quant-ph2026

Agentic AI for Scientific Reasoning in Autonomous Quantum Sensing Experiments

Takuya Isogawa, Ryotaro Okabe, Nutdech Phadetsuwannukun +2

We implement an agentic AI workflow built around a large language model (LLM) agent for autonomous experiments with nitrogen-vacancy (NV) centers in diamond. NV centers are a widel…

quant-ph2026

Approaching the Limit in Multiparameter AC Magnetometry with Quantum Control

Takuya Isogawa, Zhiyao Hu, Ayumi Kanamoto +9

Simultaneously estimating multiple parameters at the ultimate limit is a central challenge in quantum metrology, often hindered by inherent incompatibilities in optimal estimation…

quant-ph2025

Optimal Quantum Purity Amplification

Zhaoyi Li, Honghao Fu, Takuya Isogawa +2

Quantum purity amplification (QPA) provides a novel approach to counteracting the pervasive noise that degrades quantum states. We present the optimal QPA protocol for general quan…

quant-ph2025

Optimal Control of Coupled Sensor-Ancilla Qubits for Multiparameter Estimation

Ayumi Kanamoto, Takuya Isogawa, Shunsuke Nishimura +2

Designing optimal control for multiparameter quantum sensing is essential for approaching the ultimate precision limits. However, analytical solutions are generally available only…

quant-ph2025

Entanglement-assisted multiparameter estimation with a solid-state quantum sensor

Takuya Isogawa, Guoqing Wang, Boning Li +5

Quantum multiparameter estimation promises to extend quantum advantage to the simultaneous high-precision measurements of multiple physical quantities. However, realizing this capa…

quant-ph2025

Interferometry of quantum correlation functions to access quasiprobability distribution of work

Santiago Hernández-Gómez, Takuya Isogawa, Alessio Belenchia +4

The Kirkwood-Dirac quasiprobability distribution, intimately connected with the quantum correlation function of two observables measured at distinct times, is becoming increasingly…