Strongly confined atomic localization by Rydberg coherent population trapping

Area of Science:

• Quantum optics
• Atomic physics
• Laser spectroscopy

Background:

• Rydberg atoms exhibit strong interactions, enabling novel quantum phenomena.
• Coherent population trapping (CPT) is a key technique for manipulating atomic states.
• Atomic localization is crucial for quantum information processing and precision measurements.

Purpose of the Study:

• To investigate strong atomic localization using interacting Rydberg atoms in a CPT ladder configuration.
• To explore the effects of van der Waals interactions and coupling field detuning on atomic localization.
• To compare partial antiblockade (PA) and full antiblockade regimes for achieving superlocalization.

Main Methods:

• Utilizing a CPT ladder configuration with a standing-wave coupling field.
• Analyzing two antiblockade regimes: partial antiblockade (PA) and full antiblockade.
• Investigating Rydberg level energy shifts due to van der Waals interactions and coupling field detuning.

Main Results:

• Both PA and full antiblockade regimes achieve periodic patterns of tightly localized regions.
• PA regime demonstrates significantly faster convergence for spatial confinement.
• PA regime enables high-resolution Rydberg state-selective superlocalization for higher-lying Rydberg levels.
• PA regime leads to anomalous spectral linewidth changes for lower-lying Rydberg levels.

Conclusions:

• Partial antiblockade offers a more efficient pathway to achieving superlocalization compared to full antiblockade.
• The stability of the uppermost Rydberg state is critical for realizing the superlocalization regime.
• This work provides insights into controlling atomic localization with interacting Rydberg atoms.