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

  • L.Y. Len, H.K. Ng. (2018). Open-System Quantum Error Correction. Phys. Rev. A 98 022037
  • F. Leroux, K. Pandey, R. Rebhi, Frederic Chevy, C. Miniatura, B. Gremaud, D. Wilkowski. (2018). Non-Abelian adiabatic geometric transformations in a cold strontium gas. Nature Communications 9 3580
  • Frederic Bouchard, Khabat Heshami, Duncan England, Robert Fickler, Robert W. Boyd, B.-G. Englert, Luis L. Sanchez-Soto, Ebrahim Karimi. (2018). Experimental investigation of quantum key distribution protocols with twisted photons. Quantum 2 111
  • U. Bornheimer, C. Miniatura, B. Gremaud. (2018). SU(3) Topological Insulators in the Honeycomb Lattice. Phys. Rev. A 98 043614
  • YC.Zheng, Ching-Yi Lai, Todd A. Brun. (2018). Efficient Preparation of Large Block Code Ancilla States for Fault-tolerant Quantum Computation. Phys. Rev. A 97 032331
  • T.T. Chau, J.H. Hue, M. Trappe, B.-G. Englert. (2018). Systematic corrections to the Thomas-Fermi approximation without a gradient expansion. New J. Phys. 20 073003
  • L.Y. Len, J. Dai, B.-G. Englert, Leonid A. Krivitsky. (2018). Unambiguous path discrimination in a two-path interferometer. Phys. Rev. A 98 022110
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