Natural orbitals of ultracold many-body systems: from experimental reconstruction to correlation analysis in coordinate and energy space (S. Krönke)

  • Date: Jan 28, 2016
  • Time: 11:30 AM - 01:00 PM (Local Time Germany)
  • Speaker: Sven Krönke, Universität Hamburg
  • Room: Herbert Walther Lecture Hall
  • Host: MPQ, Theory Division
Deep insights into the structure of a many-body state can often be inferred from its natural orbitals (eigenvectors of the reduced one-body density operator) and their populations.

In this talk, various aspects of this theoretical concept will be discussed in the context of ultracold bosonic atoms:

First, I will consider the decay of dark solitons due to dynamical quantum depletion as an example for how a natural-orbital analysis can help unravelling complex many-body processes and intriguing aspects of local correlations. Secondly, it will be shown how two-body correlation measurements can in turn be utilized for reconstructing the natural-orbital densities for a certain class of many-body states. Finally, I will discuss in the context of binary bosonic mixtures how the interplay between inter-species correlations and excitation transfer can be made transparent by applying the natural-orbital analysis generalized to a whole species.

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