Long-range atomic correlations as a source of coherent light generation

Area of Science:

• Quantum optics
• Laser physics

Background:

• Understanding the origin of light coherence in lasers is crucial for advancing laser technology.
• Previous models often focus on phenomena above the lasing threshold.

Purpose of the Study:

• To present a novel perspective on the origin of light coherence in lasers.
• To investigate the role of atomic polarization correlations in laser coherence formation.

Main Methods:

• Theoretical analysis of atomic polarization and electromagnetic field interactions.
• Modeling the emergence of long-range correlations below the lasing threshold.
• Simulating the effect of inhibiting atomic correlations on lasing behavior.

Main Results:

• Coherence in lasers emerges from long-range correlations between active medium atom polarizations below the lasing threshold.
• These correlations establish a collective state of atomic polarizations and field modes.
• Inhibiting atomic correlations disrupts this collective state and suppresses lasing.

Conclusions:

• Atomic correlations below the lasing threshold are fundamental to laser coherence.
• This finding provides new insights into laser dynamics and coherence control.
• The results open avenues for novel methods to manipulate laser coherence.