This extended second edition includes a detailed description of the link between quantum photon states and the macroscopic electric field. It describes the particle qualities of quantum electrons via their unique operator algebra and distinguishable behavior from photons, and employs these fundamentals to describe the quantum point contact, which is the quantum analogue of a transistor and the basic building block of all nanoscopic circuits, such as electron interferometers.
In 2003, Pearsall started EPIC, The European Photonics Industry Consortium, which has been a leading contributor to the launch and the development of the European Technology Platform Photonics21. He is a Fellow of the American Physical Society and a Fellow of the IEEE.