[2] Belita Koiller completed her PhD in theoretical Condensed Matter Physics at the University of California-Berkeley in 1975, under the supervision of Leo Falicov.
She then returned to Brazil and joined the Physics Department at the Pontificia Universidade Católica do Rio de Janeiro.
She was appointed Full Professor in 1992 and in 1994 she moved to the Physics Institute at Universidade Federal do Rio de Janeiro.
She chaired the IUPAP 29th International Conference on the Physics of Semiconductors, held in Rio de Janeiro in 2008.
Later, she made contributions including the description of electron-atom collisions under laser fields, the electronic structure of disordered chains – including the renormalization group approach to local density of states, defects in alkali halides, magnetic order in potassium cyanide, hydrogen atoms and molecules under magnetic fields, magnon dynamics of disordered magnetic materials, electronic and elastic properties of semiconductor alloys, partially ordered systems, ordered and Fibonacci superlattices, theory of multiphoton transitions in crystals, random motion in networks, laser induced chaos in one dimensional systems and the Tight Binding description of shallow donors in semiconductors.