Subir Sachdev

Harvard University
Mathematical and Physical Sciences

Sachdev's research describes the connection between physical properties of modern quantum materials and the nature of many-particle quantum entanglement. He has made extensive contributions to the description of the diverse varieties of entangled states of quantum matter. These include states with topological order, with and without an energy gap to excitations, and critical states without particle-like excitations. Many of these contributions have been linked to experiments, especially to the rich phase diagrams of the high temperature superconductors.

Extreme examples of complex quantum entanglement arise in metallic states of matter often called called "strange metals". Remarkably, there is an intimate connection between the quantum physics of strange metals found in modern materials (which can be studied in tabletop experiments), and quantum entanglement near black holes in the universe. This connection is simply illustrated by the Sachdev-Ye-Kitaev model, the first version of which was introduced by Sachdev in 1993. The connection to black holes was first noted by Sachdev in 2010. 

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