SQUARE “Scalable Rare Earth Ion Quantum Computing Nodes”

2018_133 SQUARE KIT
Laser light can be used to optically read out quantum registers based on spin states of single rare earth ions in a crystalline membrane. (Image: Thomas Hümmer)

Future quantum computers could solve certain problems much more efficiently than their classical counterparts. So far, it remains a challenge to find material systems that offer the required quantum properties for scalable quantum bits in such a computer. The group of Prof. Hunger at KIT is now funded within the framework of the EU Flagship on Quantum Technologies to study materials for multi-functional quantum bits based on rare earth ion doped solids.
Their project “Scalable Rare Earth Ion Quantum Computing Nodes” (SQUARE) sets out to realize multi-qubit quantum registers with optical readout as a basic building block for scalable quantum computing and communication.

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