Horst Ludwig Störmer (German pronunciation: [ˈhɔʁst ˈluːtvɪç ˈʃtœʁmɐ]; born April 6, 1949) is a German physicist, Nobel laureate and emeritus professor at Columbia University.He was awarded the 1998 Nobel Prize in Physics jointly with Daniel Tsui and Robert Laughlin "for their discovery of a new form of quantum fluid with fractionally charged excitations" (the fractional quantum Hall effect). He and Tsui were working at Bell Labs at the time of the experiment cited by the Nobel committee.