24 qubit GHZ entanglement at room-temperature

Industry-standard ion-trap quantum processor Photo: Dieter Kühl

Austrian AQT startup has just announced their compact ion-trap quantum computer prototype, demonstrating 24 qubit GHZ entanglement in a room-temperature setup housed in two 19-inch racks.

This research work in cooperation with the University of Innsbruck, ETH Zürich and the Russian Quantum Center, marks an important step in the steady progress of Quantum Information Processing (QIP) from a purely academic discipline towards applications throughout science and industry.

Transitioning from lab-based, proof-of-concept experiments to robust, integrated realizations of QIP hardware is a crucial step in this process.

The team has presented a 19-inch rack quantum computing demonstrator based on 40Ca+ optical qubits in a linear Paul trap to address many of these challenges.

They have outlined the mechanical, optical, and electrical subsystems and also describe the automation and remote access components of the quantum computing stack.

They have also described characterization measurements relevant to digital quantum computing including entangling operations mediated by the Molmer-Sorenson interaction.

Using this setup they have produced maximally-entangled Greenberger-Horne-Zeilinger states with up to 24 ions without the use of post-selection or error mitigation techniques.

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