Konrad Lehnert
physicist
Konrad W. Lehnert is an American experimental physicist and the Eugene Higgins Professor of Physics at Yale University. He has worked in quantum electromechanics, including cooling the motion of macroscopic mechanical oscillators to their quantum ground state, entangling mechanical oscillators with electrical circuits, and applying quantum-enhanced measurement techniques to searches for axion dark matter.
Education and early career
Lehnert received his B.S. from Harvey Mudd College in 1993 and his Ph.D. in physics from the University of California, Santa Barbara in 1999, under the supervision of S. James Allen. His dissertation, titled "Nonequilibrium Dynamics in Mesoscopic Superconductor-Semiconductor-Superconductor Junctions," investigated AC Josephson effects in mesoscopic Nb-InAs-Nb junctions. He was a postdoctoral researcher at Yale University from 1999 to 2003, where he worked with Robert Schoelkopf on qubit structures built from superconducting circuits.
Career
In 2003, Lehnert joined JILA, a joint institute of the University of Colorado Boulder and the National Institute of Standards and Technology (NIST), as an Associate Fellow. He was promoted to JILA Fellow in 2007 and served as JILA Chair from 2022 to 2024. At JILA, Lehnert established a research group studying microwave quantum circuits, mesoscopic electronics, and quantum nanomechanics. His group performs measurements of electrical circuits and mechanical oscillators that reach quantum-limited sensitivity.
In July 2024, Lehnert joined the faculty of Yale University as the Eugene Higgins Professor of Physics.
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