Two-quantum magnetic resonance driven by a comb-like rf field

Area of Science:

• Atomic physics
• Quantum optics
• Magnetometry

Background:

• Exciting magnetic resonance in optically aligned atomic ensembles is crucial for precision measurements.
• Traditional methods can be complicated by substructures arising from the quadratic Zeeman shift.
• Developing new excitation methods is essential for advancing atomic sensing technologies.

Purpose of the Study:

• To introduce a novel method for exciting magnetic resonance in atomic ensembles.
• To provide a theoretical framework and experimental validation for the new excitation technique.
• To explore the advantages and applicability of this approach for magnetic resonance applications.

Main Methods:

• Utilized a comb-like radiofrequency (rf) field.
• Targeted the end sublevels of the Fg=1 state in an optically aligned atomic ensemble.
• The rf field frequency was set to twice the Zeeman frequency.

Main Results:

• Successfully excited magnetic resonance without substructures related to the quadratic Zeeman shift.
• Demonstrated a two-quantum transition (|F=1, m=-1⟩ ⇆ |F=1, m=1⟩) as the underlying mechanism.
• Experimental corroboration was achieved using 87Rb atoms.

Conclusions:

• The proposed method offers a simplified and potentially more robust way to achieve magnetic resonance.
• This technique has potential advantages for applications requiring precise magnetic field measurements.
• Further investigation into the applicability and optimization of this approach is warranted.