Coherence Constraints and the Last Hidden Optical Coherence.

Area of Science:

• Optics and Photonics
• Quantum Information Science
• Fundamental Physics

Background:

• Coherence properties are fundamental to understanding light-matter interactions.
• Existing coherence frameworks do not encompass all observed phenomena.
• A complete understanding requires identifying all fundamental coherence domains.

Purpose of the Study:

• To identify and characterize a previously unreported domain of optical coherence.
• To establish a unified theoretical framework for fundamental coherences.
• To experimentally validate the existence of the new coherence domain.

Main Methods:

• Theoretical derivation of coherence constraints in the form of complementarity relations.
• Development of a novel experimental technique for coherence domain tomography.
• Experimental investigation of the newly discovered coherence domain.

Main Results:

• Discovery of a third and final member of a fundamental triad of coherences.
• Establishment of a parallel triad of coherence constraints based on complementarity relations.
• Successful experimental entry into and characterization of the new coherence domain.

Conclusions:

• The newly discovered coherence domain completes a fundamental triad, unifying coherence properties.
• Complementarity relations provide a unifying theoretical basis for these fundamental coherences.
• The developed tomographic approach enables experimental access to this new domain.