A theoretical researcher whose joint analysis of electrons in a periodic potential helped give the quantum Hall effect a topological description. Integrating information about the quantum states across their momentum domain yields an integer contribution to Hall conductivity. The calculation relates the geometry of wavefunctions to a macroscopic electrical response.[ref]
Quantized Hall Conductance in a Two-Dimensional Periodic Potential by D. J. Thouless and others. pp. 405–407: integer expression for Hall conductance
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