Haldane worked as a physicist at
Institut Laue–Langevin in France between 1977 and 1981. In August 1981, Haldane became an assistant professor of physics at the
University of Southern California, where he remained until 1987. Haldane was then appointed as an associate professor of physics in 1981 and later a professor of physics in 1986. In July 1986, Haldane joined the department of physics at
University of California, San Diego as a professor of physics, where he remained until February 1992. In 1990, Haldane was appointed as a professor of physics in the department of physics at Princeton University, where he remains to this day. In 1999, Haldane was named as the Eugene Higgins Professor of Physics. In 2017, he was named the Sherman Fairchild University Professor of Physics. From 2013 to 2018, Haldane also held a Distinguished Visiting Research Chair at
Perimeter Institute for Theoretical Physics. Haldane is known for a wide variety of fundamental contributions to
condensed matter physics including the theory of
Luttinger liquids, the theory of one-dimensional
spin chains, the theory of
fractional quantum hall effect, exclusion statistics, entanglement spectra, and much more. , he was developing a new geometric description of the fractional quantum Hall effect that introduces the "shape" of the "composite boson", described by a "unimodular" (determinant 1) spatial metric-tensor field as the fundamental collective degree of freedom of
fractional quantum Hall effect (FQHE) states. This new "Chern-Simons + quantum geometry" description is a replacement for the "Chern-Simons + Ginzburg-Landau" paradigm introduced around 1990. Unlike its predecessor, it provides a description of the FQHE collective mode that agrees with the Girvin-Macdonald-Platzman "single-mode approximation". ==Awards and honours==