Ulf Lindström (born 12 November 1947) is a Swedish theoretical physicist working in the fields of string theory, supersymmetry, and general relativity.
The title of his PhD thesis was "Extensions of general relativity: scalar tensor theory, topology of space-time and supergravity."
He spent the year 1978-1979 at Brandeis University as a post-doc working with Stanley Deser, and after getting his doctoral degree, became a docent in Stockholm.
His most well-known contributions to theoretical physics are in the field of supersymmetry where he was one of the first people to discuss the hyper-Kähler quotient construction which was later generalized and discussed in full detail by Hitchin, Karlhede, Lindström and Roček.
He was also among the first to discuss the zero-tension limit of string theory and has lately been involved in developing the notion (introduced by Nigel Hitchin) of generalized complex geometry.