C08 – Controlling quantum systems by electrical current

Funding period: 2008 – 2011

Principal investigator: Wolfgang Belzig

Scientific staff: Anna Posazhennikova, Fei Xu, Milena Filipovic, Cecilia Holmqvist

In this project we want to investigate theoretically the quantum manipulation of molecular magnets by electric currents. By contacting the molecular magnet, the possibility of manipulation is introduced simultaneously with decoherence and relaxation. We are particularly interested in the mutual dynamics of the molecular spin and the conduction electrons. We want to find out whether the spectral density of current noise allows us to control the coherent quantum dynamics.

For further information please also refer to the group website: AG Belzig.

List of publications

2011

  • J. Hammer, W. Belzig, Quantum noise in ac-driven resonant-tunneling double-barrier structures: Photon-assisted tunneling versus electron antibunching, Phys. Rev. B 84, 085419 (2011) – DOI: 10.1103/PhysRevB.84.085419

2008

  • J. P. Morten, D. Huertas-Hernando, A. Brataas, and W. Belzig, Full counting statistics of crossed Andreev reflection, Phys. Rev. B 78, 224515 (2008)
  • A. Cottet, B. Douçot, and W. Belzig, Finite-frequency noise of a superconductor-ferromagnet quantum point contact, Phys. Rev. Lett. 101, 257001 (2008)
  • A. Cottet and W. Belzig, Conductance and current noise of a superconductor/ferromagnet quantum point contact, Phys. Rev. B 77, 064517 (2008)
  • F. Bodoky, W. Belzig, and C. Bruder, Connection between noise and quantum correlations in a double quantum dot, Phys. Rev. B 77, 035302 (2008)
  • J. P. Morten, D. Huertas-Hernando, W. Belzig, and A. Brataas, Elementary charge transfer processes in a superconductor-ferromagnet entangler, Eur. Phys. Lett. 81, 40002 (2008)