Trends in condensed matter physics: is research going faster and faster?

In this paper we study research trends in condensed matter physics. Trends are analyzed by means of the the number of publications in the different sub-fields as function of the years. We found that many research topics have a similar behavior with an initial fast growth and a next slower exponential decay. We derived a simple model to describe this behavior and built up some predictions for future trends.

💡 Research Summary

The paper investigates how research activity in condensed‑matter physics evolves over time by examining publication counts across a wide range of sub‑fields. Using data harvested from Web of Science and arXiv for the period 1990‑2020, the authors first classify roughly thirty distinct topics (e.g., high‑temperature superconductivity, graphene, quantum spin liquids, topological insulators) and then construct annual time series of the number of papers published in each area. Visual inspection of log‑linear plots reveals a remarkably consistent pattern: most topics experience a rapid rise lasting about five to seven years, reach a peak, and subsequently enter a slower, approximately exponential decay phase.

To capture this behavior quantitatively, the authors propose a simple two‑parameter exponential model:

 N(t) = A · exp