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Updated: Dec 31, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Quantum control of radical pair reactions by local optimization theory
Kenta Masuzawa1, Masaya Sato1, Michihiko Sugawara2
1Department of Chemistry, Graduate School of Science and Engineering, Saitama University, 255 Shimo-okubo, Sakura Ward, 338-8570 Saitama, Japan.
This study introduces arbitrary waveform generator (AWG) based radio frequency (RF) field control for radical pair reactions in low magnetic fields. This method enables precise control over spin dynamics for applications like reaction yield detected magnetic resonance.
Area of Science:
- Chemical Physics
- Quantum Information Science
- Magnetic Resonance Spectroscopy
Background:
- High-field arbitrary waveform generator (AWG) techniques enhance sensitivity and selectivity in electron paramagnetic resonance (EPR) and nuclear magnetic resonance (NMR).
- Current applications focus on high magnetic field regimes for quantum information processing.
Purpose of the Study:
- To propose and investigate the application of AWG-based reaction control for radical pair reactions in a low magnetic field regime.
- To explore the potential of optimized radio frequency (RF) fields for manipulating spin dynamics.
Main Methods:
- Calculated locally optimized RF fields using Sugawara's control theory.
- Applied theoretical framework to radical pair reactions in a low magnetic field environment.
Main Results:
- Demonstrated the applicability of AWG-generated RF fields for reaction control.
- Showcased potential for reaction yield detected magnetic resonance (RYDMR).
- Indicated feasibility for stimulated nuclear polarization, magnetic isotope selection, and coherent spin dynamics control.
Conclusions:
- AWG-based RF field control is a viable technique for manipulating radical pair reactions at low magnetic fields.
- This approach opens new avenues for advanced magnetic resonance applications and spin control.
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