John M. Kosterlitz

John M. Kosterlitz. John Michael Kosterlitz is a British-American physicist renowned for his groundbreaking work on phase transitions in low-dimensional systems. His collaborative research with David J. Thouless and Michael Kosterlitz on topological defects fundamentally transformed the understanding of condensed matter physics. This work was recognized with the award of the Nobel Prize in Physics in 2016, which he shared with Thouless and F. Duncan M. Haldane.

Early life and education

Born in Aberdeen during World War II, he is the son of the noted biochemist Hans Walter Kosterlitz. He attended Aberdeen Grammar School before pursuing his undergraduate studies in Natural Sciences at Gonville and Caius College, Cambridge. He earned his Bachelor of Arts degree from the University of Cambridge in 1965. He then moved to the University of Oxford, where he completed his Doctor of Philosophy in 1969 under the supervision of David J. Thouless at Brasenose College. His doctoral research focused on problems in superconductivity and critical phenomena.

Career and research

Following his doctorate, Kosterlitz held postdoctoral positions at the University of Birmingham and at Cornell University, where he worked with David Mermin. In 1974, he joined the faculty of the University of Birmingham as a lecturer. His most influential work began during this period through his collaboration with David Thouless. In 1982, he moved to the United States, taking a position at Brown University in Providence, Rhode Island, where he has remained for the majority of his career, eventually becoming the Harrison E. Farnsworth Professor of Physics. His research has extensively explored the properties of low-dimensional systems, including superfluid helium-4 films and two-dimensional crystals.

Topological phase transitions

In the early 1970s, Kosterlitz and Thouless challenged the prevailing Landau theory of phase transitions, which argued that long-range order could not exist in two-dimensional systems. They introduced the concept of the Kosterlitz–Thouless transition, a phase transition driven by the unbinding of topological defects known as vortex–antivortex pairs in a 2D XY model. This theory successfully explained the transition to a superfluid state in thin films of helium-4 and had profound implications for the study of two-dimensional magnetism. Their work established the importance of topology in condensed matter physics, influencing later discoveries like the quantum Hall effect and topological insulators.

Awards and honors

Kosterlitz's contributions have been recognized with numerous prestigious awards. He received the Lars Onsager Prize from the American Physical Society in 2000. The pinnacle of recognition came in 2016 when he was awarded the Nobel Prize in Physics jointly with David Thouless and Duncan Haldane. He was elected a Fellow of the American Physical Society and, in 2018, a Fellow of the Royal Society. He has also been honored with an honorary doctorate from the University of St Andrews and is a member of the American Academy of Arts and Sciences.

Personal life

Kosterlitz is married and has one child. He became a naturalized citizen of the United States after his move to Brown University. Outside of physics, he is known to be an avid skier and enjoys hiking in the mountains. His father, Hans Walter Kosterlitz, was a co-discoverer of enkephalins, and his brother is the physicist J. Michael Kosterlitz.

Category:1943 births Category:Living people Category:British physicists Category:American physicists Category:Nobel laureates in Physics Category:Fellows of the Royal Society Category:Brown University faculty Category:University of Birmingham faculty Category:Alumni of the University of Cambridge Category:Alumni of the University of Oxford