David J. Thouless

David James Thouless (; 21 September 1934 – 6 April 2019) was a British physicist. He is a winner of the Wolf Prize and the 2016 Nobel Prize in Physics along with F. Duncan M. Haldane and J. Michael Kosterlitz for theoretical discoveries of topological phase transitions and topological phases of matter.
In 2016, Thouless was reported to be suffering from dementia. He died on 6 April 2019 in Cambridge, at the age of 84.