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TT: Fachverband Tiefe Temperaturen

TT 49: Poster Session: Superconductivity

TT 49.32: Poster

Mittwoch, 3. April 2019, 15:00–18:30, Poster D

Chip-based magnetic traps for superconducting levitation of µm-sized particles — •Martí Gutierrez Latorre, David Niepce, Matthias Rudolph, and Witlef Wieczorek — Quantum Technology Laboratory, Chalmers University of Technology, Gothenburg, Sweden

Levitated mechanical resonators are a unique platform capable of reaching unrivaled performance in sensing and, potentially, in realizing macroscopic superposition states. This is based on their expected ultra-low coupling to the environment resulting in unprecedented high mechanical quality factors. As a first step, we develop chip-based magnetomechanical devices for superconducting magnetic levitation. We present FEM simulations of integrated trap architectures for levitation of µm-sized particles. The force on the levitated particle and its potential energy are calculated, showing that trapping frequencies of a few hundreds of kHz are readily achievable. Additionally, we demonstrate the fabrication of integrated magnetic traps and particles made of Nb films on Si substrates via conventional micro-fabrication techniques. Our results pave the way to observing superconducting levitation of µm sized particles at 4K.