John M. Martinis coauthored a 1985 observation of quantized energy levels in a current-biased Josephson junction. The relevant coordinate was the phase difference across an electrical circuit element, rather than the position of one isolated particle. The measured levels agreed with a quantum mechanics calculation using junction parameters measured in the classical regime. This showed that a fabricated superconducting circuit could possess a discrete excitation spectrum suitable for controlled quantum experiments.[ref]
A physicist researching superconducting devices and quantum computers based on Josephson junctions.[ref]
John Martinis by University of California, Santa Barbara. Distinguished Professor; research paragraph on superconducting devices and Josephson-junction quantum bits
Portrait of John M. Martinis
. David Orban, Flickr photograph, 13 February 2007; existing Commons crop. Creative Commons Attribution 2.0 Generic., via Wikimedia Commons. Source. Articles by others on the same topic
John M. Martinis is a prominent American physicist known for his work in the field of quantum computing and superconducting qubits. He has made significant contributions to the development of quantum processors and the implementation of quantum error correction techniques. Martinis is a professor at the University of California, Santa Barbara, and has been involved in various research initiatives, including collaborations with companies focused on advancing quantum technology.