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QI: Fachverband Quanteninformation
QI 36: Poster – Quantum Information (joint session QI/Q)
QI 36.57: Poster
Donnerstag, 13. März 2025, 17:00–19:00, Tent
Towards Scalable Quantum Computing with Trapped Ions: Single-Ion Addressing and Efficient Cooling — •Robin Strohmaier, Daniel Wessel, Alexander Müller, Jonas Vogel, Björn Lekitsch, and Ferdinand Schmidt-Kaler — QUANTUM, Institut für Physik, Johannes Gutenberg-Universität Mainz
Trapped ions are a leading platform for scalable and fault-tolerant quantum computing. In this work, we present two critical advancements toward realizing scalable quantum computing with linear crystals of ions: precise single-ion addressing and efficient near-ground-state cooling of ion crystals.
Single ion addressing of the spin qubit in 40Ca+ is achieved using a crossed acousto-optic deflector (AOD) setup. This system utilizes a tightly focused 400 nm laser beam to drive stimulated Raman transitions between spin states. We demonstrate a beam focus of 1 µm, enabling low crosstalk between neighboring ions. Additionally, we implement several ground state cooling schemes which can be used within sequences as well. This enables longer gate sequences and hence deeper algorithms. Combined with our new developed, SLE fabricated, glass trap and its low heating rates, these advancements support the handling of ion crystals with tens of ions, paving the way for operations involving multiple logical qubits. These results mark significant progress toward scalable quantum computation with trapped ions.
Keywords: trapped-ion quantum computing; addressing; groundstate cooling