Millisecond-Lived Circular Rydberg Atoms in a Room-Temperature Experiment

Area of Science:

• Quantum physics
• Atomic physics
• Quantum technologies

Background:

• Circular Rydberg states offer large interactions and long lifetimes, crucial for quantum technologies.
• High-temperature environments, like room temperature, degrade these lifetimes due to blackbody radiation.
• Current applications often require complex cryogenic setups to maintain state lifetimes.

Purpose of the Study:

• To demonstrate long lifetimes of circular Rydberg states at room temperature.
• To overcome the limitations imposed by blackbody radiation at ambient temperatures.
• To enable practical room-temperature applications of circular Rydberg atoms.

Main Methods:

• Utilizing laser-cooled atoms with a principal quantum number of 60.
• Employing a simple plane-parallel capacitor to inhibit blackbody-radiation-induced transfers.
• Ensuring full optical access through a transparent capacitor electrode.

Main Results:

• Achieved a circular Rydberg state lifetime exceeding 1 millisecond at room temperature.
• Demonstrated effective suppression of blackbody radiation effects using the capacitor.
• Maintained significant optical access to the atoms within the capacitor.

Conclusions:

• Circular Rydberg states can maintain long lifetimes at room temperature with appropriate shielding.
• The developed inhibition capacitor technology facilitates room-temperature quantum experiments.
• This breakthrough opens doors for widespread quantum metrology and simulation applications.