Quantum Optics Group (LMU) - Quantum Many Body Systems Division (MPQ)

A Microscopic View on Quantum Fluctuations

Schematic view of the atom distribution in the optical lattice. Quantum fluctuations (white) are directly visible as neighbouring dark spots. The picture shows a rendered image of an original dataset.  On top of a fixed density background, quantum fluctuations in a bosonic Mott insulator emerge as bound pairs of an empty site and a doubly occupied site (called particle-hole pairs). In the experiment, the atoms on doubly occupied sites are lost in the detection process due to collisions. Therefore particle-hole pairs show up as neighboring empty sites (marked as white handles).

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