The formation and development of the concept of virtual particles

点击翻译按钮获取中文摘要

This project investigates the concept of a virtual particle from the viewpoint of the history and philosophy of science ("integrated HPS"). This concept is an integral part of modern physics, mainly since it provides a means to describe and interpret complex quantum physical processes in comparatively simple terms. Despite its wide use, the notion of a virtual particle appears not to be clearly defined. The present project traces the origins of the concept and follows its evolution through time. Phase 1 investigated systematically the reasons for the introduction of the concept in quantum mechanics and early quantum field theory (QFT). Phase 2 will focus on the further development of the concept in the context of QFT, S-matrix theory, and the Standard Model. In this phase we also aim to explain the genesis of today’s diverse uses of the term and, taking into account the results from the previous phase, to further our general understanding of concept formation in the physical sciences.