Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 48: Quantum Gases (Fermions) III
Q 48.3: Vortrag
Mittwoch, 7. März 2018, 14:30–14:45, K 1.022
Microscopic confirmation of fluctuation relations in Hubbard chains — •Timon Hilker1, Guillaume Salomon1, Joannis Koepsell1, Jayadev Vijayan1, Michael Höse1, Immanuel Bloch1,2, and Christian Gross1 — 1Max-Planck-Institute für Quantenoptik, Garching — 2Fakultät für Physik, Ludwig-Maximilians-Universität, München
Fluctuation-dissipation relations express fundamental connections between the equilibrium fluctuations of a system, its linear response to an external force and its temperature. Here, we present an experimental confirmation of such a relation for Fermi-Hubbard chains with ultracold 6Li atoms by measuring density-fluctuations, compressibility and temperature simultaneously. With our quantum gas microscope, we have access to all three contributions including the crucial non-local fluctuations between all pairs of sites. Conversely, the relation provides a robust method for a theory-independent measurements of a system’s temperature even at strong interactions.