Vertical ion transport in a surface Paul trap: escalator and elevator approaches

• URL: http://arxiv.org/abs/2603.06208v1
• Date: Fri, 06 Mar 2026 12:25:32 GMT
• Title: Vertical ion transport in a surface Paul trap: escalator and elevator approaches
• Abstract summary: Surface ion traps have become the leading platform for quantum processors with high quantum volume.<n>We introduce an "escalator" - a geometrically optimized transition between trapping zones of different confinement heights.<n>We present a comparative analysis of two "elevator" configurations that reposition the RF null dynamically via additional electrode voltages.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Surface ion traps confining and manipulating tens of ion qubits have become the leading platform for quantum processors with high quantum volume. These devices employ the Quantum Charge-Coupled Device (QCCD) architecture, wherein multiple trapping zones are linked by an on-chip transport network that shuttles ion chains, enabling full connectivity through physical ion transport in a plane parallel to the chip surface. The ability to move ions perpendicular to this plane can offer additional advantages, including tuning the laser-ion interaction strength, systematic studies of surface-induced heating mechanisms, and precise alignment with a mode of an external optical cavity. We introduce an "escalator" - a geometrically optimized transition between trapping zones of different confinement heights - and present a comparative analysis of two "elevator" configurations that reposition the RF null dynamically via additional electrode voltages. Both approaches enable nearly a twofold change in the ion confinement height above the chip surface.

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