Rostock 2019 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 25: Poster: Quantum Optics and Photonics I

Q 25.24: Poster

Dienstag, 12. März 2019, 16:30–18:30, S Atrium Informatik

Towards ultra-low entropy quantum states in the Fermi-Hubbard model — •Justus Brüggenjürgen, Muqing Xu, Geoffrey Ji, Christie Chiu, and Markus Greiner — Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA

Quantum gas microscopy of fermionic atoms enables site-resolved studies of strongly correlated quantum many-body states in the Fermi-Hubbard Model. The addition of entropy redistribution via a digital micromirror device (DMD) has allowed us to achieve sufficiently low temperatures for long-range antiferromagnetic order. To reach even lower temperatures and address long-standing open questions of the repulsive Fermi-Hubbard model, new techniques for quantum state preparation are required. In particular, we have created ultra-low entropy band insulators as a starting point to adiabatically realize ultra-low entropy many-body states. To perform this adiabatic ramp, we are developing a low-noise interfering lattice, which enables dynamic tunability of the lattice geometry. Such a setup can also be used for other applications, including simultaneous readout of both spin species. I will discuss our progress towards ultra-low entropy quantum state preparation with interfering lattices.