Enhancement of Rydberg-mediated single-photon nonlinearities by electrically tuned Förster resonances

Area of Science:

• Quantum optics
• Atomic physics
• Photonics

Background:

• Strong light-matter interactions are key for single-photon devices.
• Electromagnetically induced transparency (EIT) enables light manipulation at the single-photon level.
• Rydberg atoms offer strong interactions but require precise control.

Purpose of the Study:

• To experimentally demonstrate Stark-tuned Förster resonances for enhanced Rydberg atom-photon interactions.
• To improve the performance of single-photon transistors and Rydberg atom detection.
• To advance the development of photonic quantum gates.

Main Methods:

• Utilizing Stark-tuned Förster resonances to increase effective photon-Rydberg atom interaction.
• Experimental demonstration of enhanced single-photon transistor gain.
• High-fidelity non-destructive detection of single Rydberg atoms.
• Precision spectroscopy on Rydberg pair states.

Main Results:

• Achieved single-photon transistor gain exceeding 100.
• Reached non-destructive Rydberg atom detection fidelity beyond 0.8.
• Demonstrated gate photon read-out with gain > 2.
• Identified key decoherence mechanisms for Rydberg transistors through theoretical modeling.

Conclusions:

• Stark-tuned Förster resonances are a powerful technique for enhancing light-matter interactions.
• This method significantly improves single-photon devices and quantum sensing capabilities.
• The findings pave the way for realizing robust photonic quantum gates.