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
cavity QED with RX qubits

  Long distance coupling of resonant exchange qubits
  M. Russ and G. Burkard
  Phys. Rev. B 92, 205412 (2015) (highlighted as an Editor's suggestion)

electro-optic sampling of vacuum fluctuations   Direct sampling of electric-field vacuum fluctuations
  C. Riek, D. V. Seletskiy, A. S. Moskalenko, J. F. Schmidt, P. Krauspe, S. Eckart, S. Eggert, G. Burkard, A. Leitenstorfer
  Science 350, 420 (2015) [free access to article via this site]

  Paraxial Theory of Direct Electro-optic Sampling of the Quantum Vacuum
  A. S. Moskalenko, C. Riek, D. Seletskiy, G. Burkard, A. Leitenstorfer
  Phys. Rev. Lett. 115, 263601 (2015)

spectral function in red laser speckle

  Semiclassical spectral function for matter waves in random potentials
  Martin Trappe, Dominique Delande, and Cord A. Müller
  J. Phys. A: Math. Theor. 48, 245102 (2015)
  selected for the Publisher's Pick accompanied by an interview

  k.p theory for two-dimensional transition metal dichalcogenide semiconductors
  A. Kormányos, G. Burkard, M. Gmitra, J. Fabian, V. Zólyomi, N. D. Drummond, and V. Fal'ko
  2D Mater. 2, 022001 (2015)

spin-valley qubit register

  Hybrid Spin and Valley Quantum Computing with Singlet-Triplet Qubits
  Niklas Rohling, Maximilian Russ, and Guido Burkard
  Phys. Rev. Lett. 113, 176801 (2014)

Bloch sphere image

  Ultrafast optical control of orbital and spin dynamics in a solid-state defect
  L. C. Bassett, F. J. Heremans, D. J. Christle, C. G. Yale, G. Burkard, B. B. Buckley, and D. D. Awschalom
  Science 345, 1333 (2014)
  Perspectives Article: L. Childress, Science 345, 1247 (2014)

TMDC QD image
  Spin-Orbit Coupling, Quantum Dots, and Qubits in
  Monolayer Transition Metal Dichalcogenides

  A. Kormányos, V. Zólyomi, N.D. Drummond, G. Burkard
  Phys. Rev. X 4, 011034 (2014)