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Q: Fachverband Quantenoptik und Photonik

Q 25: Poster: Quantum Optics and Photonics I

Q 25.30: Poster

Tuesday, March 12, 2019, 16:30–18:30, S Atrium Informatik

Scaling it up: From few to many — •Keerthan Subramanian, Luca Bayha, Marvin Holten, Antonia Klein, Puneet Murthy, Philipp Preiss, Gerhard Zürn, and Selim Jochim — Physikalisches Institut, Universität Heidelberg, Germany

In a novel, bottom-up approach we present first few results toward studying many-body states at low entropy. Starting with, for example, two spin states and two atoms in a microtrap, we deform the potential adiabatically to a double well using a Spatial Light Modulator(SLM), which can also be used to create tailored optical potentials. To study the Hubbard model for instance, we plan to create double wells in ground states and adiabatically merge them creating a many-body state at low entropy reminiscent of quantum Lego blocks. To this end we have already demonstrated deterministic preparation of few-fermion systems in controlled quantum states in a double well. This preparation capability is complemented with single particle position and momentum imaging with spin readout in free-space using an EMCCD. Since an atom can be imaged by detecting as few as ~25 photons, elaborate cooling schemes and pinning during imaging are not warranted thereby distinguishing it from existing quantum gas microscopes. With this mix of deterministic preparation, tailored optical potentials, tunable interactions and single particle imaging we present first glimpses of finite size systems, like plaquettes, that we study before embarking on more complicated many-body systems.