Freiburg 2024 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 37: Poster III
Q 37.44: Poster
Wednesday, March 13, 2024, 17:00–19:00, Tent B
Ion trap architectures for enhanced qubit connectivity — •Marco Valentini1, Martin van Mourik1, Friederike Butt4, Matthias Dietl1,2, Jakob Wahl1,2, Michael Pfeifer1,2, Marco Schmauser1, Bassem Badawi1, Philip Holz3, Clemens Rössler2, Markus Müller4, Thomas Monz1,3, Philipp Schindler1, and Rainer Blatt1,3 — 1Institut für Experimentalphysik, Universität Innsbruck, Technikerstrasse 25, 6020 Innsbruck, Austria — 2Infineon Technologies Austria AG, Villach, Austria — 3Alpine Quantum Technologies GmbH, 6020 Innsbruck, Austria — 4Institute for Quantum Information, RWTH Aachen University, 52074 Aachen, Germany
We investigate scalable ion trap architectures for quantum computing, where independent ion strings are located in distinct lattice sites (or potential wells) in a 2D array of RF traps. Distinct ion strings are coupled via their dipole-dipole interaction. Full 2D connectivity is achieved tuning the distance between adjacent potential wells along two orthogonal directions: One direction (axial) is achieved controlling DC voltages, and the other (radial) controlling RF fields. In this work we demonstrate the building blocks of such an architecture using two surface ion traps. With the first, we demonstrate DC shuttling-based well-to-well coupling rates up to 40 kHz, and phonon exchange between ion strings at the quantum level. With the second, we characterize transport of ions along the radial direction, and measure well-to-well coupling rates up to 15 kHz. These results provide an important insight into the implementation of fully controllable 2D ion trap lattices, and pave the way to the realization of 2D logical encoding of qubits.
Keywords: Surface ion trap; Ion transport; Quantum computing architecture; Qubit connectivity