There was an interesting study done earlier this year called What’s the Magic Word? A CONTROL THEORY OF LLM PROMPTING.
The study applied control theory to prompt engineering in Large Language Models (LLMs), demonstrating that short prompts can significantly influence the output, thus providing a foundational understanding of LLM controllability or what they termed "Magic Words".
Summary and Overview of the Study
This research attempts to address how to mathematically formalize prompt engineering for large language models (LLMs) through the lens of control theory (a fundamentally flawed endeavour but that's for another time).
From a practical aspect, the study

