Berge Englert Group

We are investigating questions that can be grouped into two categories: (1) quantum information proper and (2) cold atoms.

A central theme is the perennial question: What can we know about a quantum system? Specific problems under study concern complementarity and its immediate consequences, such as quantitative aspects of wave-particle duality; measurement schemes for quantum state tomography; the reconstructing of quantum states from noisy and incomplete measurements; as well as the robust encoding of quantum information for the purposes of storage and processing.

We are interested in ultracold dilute gases of neutral atoms, fermions and bosons, in two-dimensional and one-dimensional geometries, which will soon be ready for experimental studies at CQT and elsewhere. The problems under study include the band structure, transport properties, and finite-temperature effects of many-atom systems in periodic lattices, such as the graphene-type honeycomb lattice; strongly interacting systems of this kind; mixtures of fermions and bosons; existence and phenomenology of the FFLO phase in one- dimensional and two-dimensional systems; superfluidity and other phases with particular properties; and analogs of the Hall and spin-Hall effects.

Group Members

Recent papers

  • YC.Zheng, H.K. Ng. (2017). Digital quantum simulator in the presence of a bath. Phys. Rev. A 96 042329
  • M. Trappe, L.Y. Len, H.K. Ng, B.-G. Englert. (2017). Airy-averaged gradient corrections for two-dimensional fermion gases. Ann. Phys. 385 136
  • B.-G. Englert, Kelvin Horia, J. Dai, L.Y. Len, H.K. Ng. (2017). Past of a quantum particle revisited. Phys. Rev. A 96 022126
  • Gabriel Lemarié, Cord A. Müller, David Guéry-Odelin, C. Miniatura. (2017). Coherent back and forward scattering peaks in the quantum kicked rotor. Phys. Rev. A 95 043626
  • J. Shang, Zhengyun Zhang, H.K. Ng. (2017). Superfast maximum likelihood reconstruction for quantum tomography. Phys. Rev. A 95 062336
  • B. Gremaud, G. Batrouni. (2017). Haldane phase in the sawtooth lattice: Edge states, entanglement spectrum and the flat band. Phys. Rev. B 95 165131
  • S. Ghosh, C. Miniatura, Nicolas Cherroret, Dominique Delande. (2017). Coherent forward scattering as a signature of Anderson metal-insulator transitions. Phys. Rev. A (R) 95 041602
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