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Researchers at UMass Amherst and UC Santa Barbara have demonstrated high-fidelity trapped-ion quantum control using an integrated photonic laser chip, directly addressing the scalability bottleneck caused by bulky external optics. By stabilizing a narrow-linewidth laser on-chip, this work enables compact photonics suitable for scaling up ion-trap architectures without sacrificing coherence times or gate precision.
Researchers Achieve 99.61% Single-Qubit Gate Fidelity with Integrated Laser
A two-qubit entanglement was generated with a fidelity of 92. 35%, achieved not with complex laboratory setups but using light from an integrated laser chip. Until now, driving precise qubit gates demanded bulky optics; this work demonstrates coherent control via compact photonics suitable for scaling up trapped-ion quantum computers.
Scaling trapped-ion quantum computers has been hindered by bulky tabletop lasers and complex optical systems. Demonstrating coherent control of strontium ions using a fully integrated photonic laser stabilised with an on-chip device is the achievement of researchers at the University of Massachusetts Amherst and the University of California Santa Barbara. Coherent control of strontium ions is key technology for quantum computing enabled by this fully integrated photonic laser system. Current systems require bulky…
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