Altshuler's contributions to condensed matter physics are broad and manifold. He is particularly famous for his work on disordered electronic systems, where he was the first to calculate singular quantum interference corrections to electron transport due to interactions (Altshuler-Aronov corrections). Together with Aronov, he has also developed theory of dephasing in weak-localization. In collaboration with
Boris Shklovskii, Altshuler developed the theory of level repulsion in disordered metals. He has also significantly contributed to the theory of universal conduction fluctuations. More recently, Altshuler and
Igor Aleiner have pioneered the new field of
many-body localization, where they showed that an interacting many-body system may remain localized - a phenomenon descending from the famous phenomenon of
Anderson localization. The latter achievement of Altshuler and Aleiner is widely regarded as a major milestone and many-body localization, they introduced, has now developed into a flourishing new field of physics. In 2016, the predicted phenomenon of many-body localization was observed experimentally by the group of
Immanuel Bloch in Munich, Germany. ==Awards and honors==