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Coherent optical detection of highly excited Rydberg states using electromagnetically induced transparency.

A K Mohapatra¹, T R Jackson, C S Adams

¹Department of Physics, Durham University, Rochester Building, South Road, Durham DH1 3LE, United Kingdom.

Physical Review Letters

|May 16, 2007

Summary

We used electromagnetically induced transparency (EIT) to optically detect highly excited Rydberg states up to n=124. This method also probes electric field transients and Rydberg fine structure splitting in gases.

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Area of Science:

Atomic, Molecular, and Optical Physics
Quantum Optics

Background:

Rydberg states are highly excited atomic states with unique properties.
Electromagnetically induced transparency (EIT) is a quantum interference effect that enables novel light-matter interactions.

Purpose of the Study:

To demonstrate coherent optical detection of highly excited Rydberg states using EIT.
To utilize EIT for nondestructive probing of Rydberg energy levels and electric field transients.
To extend measurements of Rydberg state fine structure splitting.

Main Methods:

Coherent optical detection using electromagnetically induced transparency (EIT).
Spectroscopic analysis of highly excited Rydberg states (up to n=124).
Measurement of fine structure splitting for nd Rydberg series (up to n=96).

Main Results:

Successful detection of Rydberg states up to principal quantum number n=124.
Demonstration of EIT spectra for direct optical detection of electric field transients in gases.
Extended measurements of fine structure splitting for the nd series up to n=96.

Conclusions:

EIT provides a direct, nondestructive method for probing Rydberg states and energy levels.
EIT-based Rydberg spectroscopy can detect electric field transients in the gas phase.
Coherent coupling of Rydberg states via EIT opens possibilities for quantum information processing applications like cross-phase modulation and photon entanglement.