Field Theoretical Investigations of Coherent Phenomena.

E. M. Kessler

The role of dissipation in the emergence of coherent phenomena is ambiguous. On the one hand, the dissipative coupling to an environment is the biggest adversary of coherence, corrupting the quantum properties of a physical state. On the other hand, recent theoretical and experimental results revealed that dissipation itself can be the driving force behind the occurrence of coherent behavior. This Thesis theoretically investigates both aspects of this interplay in mesoscopic solid-state systems.

Jean‐Claude Diels, Wolfgang Rudolph

Alan D. Streater, Jeffrey A. Kleinfeld

We discuss theoretical and experimental investigations of gain phenomena and refractive index control in atomic systems due to coherences induced by a pump laser. Experimental results in potassium vapor are compared with 3-level and 4-level models.

Nicolai G. Basov

Ben M. Gripaios

Levent Güler

This project presents a theoretical investigation into interference-based information structures as a possible framework for understanding the emergence of conscious observers. The work explores how observer-related phenomena may arise from structured information dynamics without presupposing consciousness as a fundamental ontological primitive. The focus is on conceptual clarity, interdisciplinary compatibility, and theoretical coherence rather than empirical claims. The project includes: – A German original version of the preprint – An English, author-reviewed translation In addition to the main preprint, the project includes a follow-up manuscript that provides conceptual extensions of the INSI framework with respect to space, time, gravitation, entropy, and irreversibility.