Konrad Lehnert Portrait
Professor Adjoint • Fellow - JILA
Physics

Office: JILA A400

Research Interests:

Studying quantum coherence in macroscopic mechanical oscillators, developing quantum-coherent networks of microwave signals for control and measurement, and implementing quantum-limited measurements in astrophysics and condensed matter experiments.

Selected Publications:

  1. Generation and efficient measurement of single photons from fixed-frequency superconducting qubits W.F. Kindel, M.D. Schroer, K.W. Lehnert, Phys. Rev. A 93, 033817 (2016). DOI: 10.1103/PhysRevA.93.033817
  2. Closing a quantum feedback loop inside a cryostat: Autonomous state preparation and long-time memory of a superconducting qubit C.Kraglund Andersen, J. Kerckhoff, K.W. Lehnert, B.J. Chapman, K. Mølmer, Phys. Rev. A 93, 012346 (2016). DOI: 10.1103/PhysRevA.93.012346
  3. Laser Cooling of a Micromechanical Membrane to the Quantum Backaction Limit R.W. Peterson, T.P. Purdy, N.S. Kampel, R.W. Andrews, P.L. Yu, K.W. Lehnert, C.A. Regal, Phys. Rev. Lett. 116, 063601 (2016). DOI: 10.1103/PhysRevLett.116.063601
  4. Proposal to Test Bell's Inequality in Electromechanics S.G. Hofer, K.W. Lehnert, K. Hammerer, Phys. Rev. Lett. 116, 070406 (2016). DOI: 10.1103/PhysRevLett.116.070406
  5. On-Chip Superconducting Microwave Circulator from Synthetic Rotation J. Kerckhoff, K. Lalumière, B.J. Chapman, A. Blais, K.W. Lehnert, Phys. Rev. Applied 4, 034002 (2015). DOI: 10.1103/PhysRevApplied.4.034002
  6. Generating and verifying entangled itinerant microwave fields with efficient and independent measurements H.S. Ku, W.F. Kindel, F. Mallet, S. Glancy, K.D. Irwin, G.C. Hilton, L.R. Vale, K.W. Lehnert, Phys. Rev. A 91, 042305 (2015). DOI: 10.1103/PhysRevA.91.042305
  7. Quantum-enabled temporal and spectral mode conversion of microwave signals R.W. Andrews, A.P. Reed, K. Cicak, J.D. Teufel, K.W. Lehnert, Nature Communications 6, (2015). DOI: 10.1038/ncomms10021
  8. Connecting microwave and optical frequencies with a vibrational degree of freedom R.W. Andrews, R.W. Peterson, T.P. Purdy, K. Cicak, R.W. Simmonds, C.A. Regal, K.W. Lehnert, SPIE 9343, Laser Resonators, Microresonators, and Beam Control XVII 9343, 934309 (2015). DOI: 10.1117/12.2082941