Bonn 2025 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 37: Poster – Highly Charged Ions and their Applications
A 37.1: Poster
Donnerstag, 13. März 2025, 17:00–19:00, Tent
Towards quantum gate with highly charged ion — •Shuying Chen1, Lukas J. Spieß1, Alexander Wilzewski1, Malte Wehrheim1, José R. Crespo Urrutia-López2, and Piet O. Schmidt1,3 — 1QUEST Institute for Experimental Quantum Metrology, Physikalisch-Technische Bundesanstalt, Braunschweig, Germany — 2Max-Planck-Institut für Kernphysik, Heidelberg, Germany — 3Institut für Quantenoptik, Leibniz Universität Hannover, Hannover, Germany
Highly charged ions (HCI) are good candidates for constructing of high-precision optical clocks, due to low sensitivity to from external field perturbations. Long-lived clock states in HCI also offer promising prospects for highly-stable qubits for high-fidelity quantum gates. Furthermore, the engineering of entangled states in HCI enables the utilization of a decoherence-free subspace for magnetic field shift insensitivity or quadrupole moment measurements in HCI clocks. We present progress made in the construction of an entangled gate utilizing Ni12+. Thus far, a three-ion crystal consisting of 2 Ni12+ and one Be+ have been prepared for sympathetic cooling and quantum logic readout by splitting the initial larger crystal and removing the excess Be+ ions.The three axial motional modes were successfully identified and ground state cooled. Read out of the states of the two HCI are performed using quantum logic on the logic transition. The two Ni12+ ions will be entangled through Mølmer-Sørensen gate.
Keywords: highly charged ions; optical clock; quantum gate and entanglement; quantum logic spectroscopy; trapped ion