Quantum Information

Quantum information theory is a research area which targets on the information theoretical implications of nonclassical correlations in possible measurement results on multipartite quantum systems. Our main interest is the application of proposed, computationally manageable entanglement measures for mixed states of bipartite quantum systems, and their implementation in monitoring the entanglement of multipartite systems, possibly coupled to an (incoherent) environment. We aim at designing scenarios which allow for a direct experimental measurement of entanglement in complex many-body systems, such as ultracold quantum gases in optical lattices.

The left figure sketches ultracold bosons in the presence of dissipation which triggers the dynamical creation of a Schrödinger CAT state between the wells 1 and 3.

Creation of entanglement in a superconducting cavity QED setup by accelerated adiabatic evolution (right).


  • F. Petiziol, M. Mahmedi, S. Carretta, S. Wimberger, and F. Mintert,
    Quantum simulation of three-body interactions in weakly driven quantum systems, submitted (2021)

  • A. Chiesa, F. Petiziol, E. Macaluso, S. Wimberger, P. Santini, and S. Carretta,
    Two-qubit gates on molecular spin qubits with embedded quantum-error correction, AIP Advances 11, 025134 (2021)

  • A. Chiesa, E. Macaluso, F. Petiziol, S. Wimberger, P. Santini, and S. Carretta,
    Molecular Nanomagnets as Qubits with Embedded Quantum-Error Correction, J. Phys. Chem. Lett. 11, 8610 (2020)

  • F. Petiziol, B. Dive, S. Carretta, R. Mannella, F. Mintert, and S. Wimberger,
    Accelerating adiabatic protocols for entangling two qubits in circuit QED, Phys. Rev. A 99, 042315 (2019)

  • S. Dadras, A. Gresch, C. Groiseau, S. Wimberger, and G. S. Summy
    Qquantum walk in momentum space with a Bose-Einstein condensate, Phys. Rev. Lett. 121, 070402 (2018)

  • D. Witthaut, S. Wimberger, R. Burioni, and M. Timme
    Classical synchronization indicates persistent entanglement in isolated quantum systems, Nat. Comm. 8, 14829 (2017)

  • C. A. Parra-Murillo, M. H. Munoz-Arias, J. Madronero, and S. Wimberger
    Generation of robust entangled states in a non-hermitian periodically driven two-band Bose-Hubbard system, Phys. Rev. A 95, 032125 (2017)

  • G. Kordas, S. Wimberger, and D. Witthaut
    Decay and fragmentation in an open Bose-Hubbard chain, Phys. Rev. A 87, 043618 (2013)
  • G. Kordas, S. Wimberger, and D. Witthaut
    Dissipation induced macroscopic entanglement in an open optical lattice, EPL 100, 30007 (2012)
  • M. Lubasch, F. Mintert, and S. Wimberger
    Dynamical enhancement of spatial entanglement in massive particles, Phys. Rev. A 84, 063615 (2011)
  • D. Witthaut, F. Trimborn, and S. Wimberger
    Dissipation-induced coherence and stochastic resonance of an open two-mode Bose-Einstein condensate, Phys. Rev. A 79, 033621 (2009)
  • D. Witthaut, F. Trimborn, and S. Wimberger
    Dissipation induced coherence of a two-mode Bose-Einstein condensate, Phys. Rev. Lett. 101, 200402 (2008)

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