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In a computer or communication device, information is embodied in some physical system; the capabilities of such an information processing device are derived from its physical properties. It is known that if the device is quantum mechanical, i.e., it exploits the physical laws of quantum mechanics, then its capabilities can exceed those of classical devices. Taking a theoretical physics approach, our group investigates solid-state systems for quantum information processing. In particular, we investigate single electron spin dynamics and coherence in semiconductor and carbon nanostructores (quantum dots, quantum wires, etc.) as well as superconducting qubits. Further research areas include light-matter interactions between solid-state qubits and photons, optical cavities and the use of cavity quantum electrodynamics for quantum information processing, and the production, dynamics, and characterization of entanglement in solid-state systems. We are also working on the theory of quantum computation and quantum information. (read more) (deutsch)

  Hear theoretical physicists John Preskill and Spiros Michalakis
  describe quantum computing on YouTube.
  (illustrated by Jorge Cham of PhD Comics)

  Guido.Burkard@uni-konstanz.de, Department of Physics (personal details, contact details)

  research highlights

Superconductor–semiconductor hybrid-circuit quantum electrodynamics   Superconductor–semiconductor hybrid-circuit quantum electrodynamics
  G. Burkard, M. J. Gullans, X. Mi, and J. R. Petta
  Nature Rev. Phys. 2, 129 (2020).

squeezing in the time domain   Subcycle squeezing of light from a time flow perspective
  M. Kizmann, T. Lucena de M. Guedes, D.V. Seletskiy, A.S. Moskalenko, A. Leitenstorfer, and G. Burkard
  Nature Physics 15, 960 (2019)
  access to free view-only article: here

  University of Konstanz News Release [English / Deutsch]

QUEX qubit   Quadrupolar exchange-only spin qubit
  M. Russ, J. R. Petta, and G. Burkard
  Phys. Rev. Lett. 121, 177701 (2018)

  Selected as Editor's Suggestion

  University of Konstanz News Release [English / Deutsch]

spin-photon interface in Si   A Coherent Spin-Photon Interface in Silicon
  X. Mi, M. Benito, S. Putz, D. M. Zajac, J. M. Taylor, G. Burkard, and J. R. Petta
  Nature 555, 599 (2018)

  University of Konstanz News Release [English / Deutsch]

  theory paper:
  M. Benito, X. Mi, J. M. Taylor, J. R. Petta, and G. Burkard
  Phys. Rev. B 96, 235434 (2017)

cavity QED with RX qubits

  Resonantly driven CNOT gate for electron spins
  D.M. Zajac, AJ. Sigillito, M. Russ, F. Borjans, J.M. Taylor, G. Burkard, J.R. Petta
  Science 359, 439 (2018)

  Related Nature News article Silicon gains ground in quantum-computing race
  University of Konstanz News Release [English / Deutsch]

  theory paper:
  M. Russ, D. M. Zajac, A. J. Sigillito, F. Borjans, J. M. Taylor, J. R. Petta, and G. Burkard
  Phys. Rev. B 97, 085421 (2018)