QCage is a microwave chip packaging system for high-fidelity operation of superconducting quantum processors and similar microwave-resonator based quantum measurements.

QCage.24 is a compact holder system for microwave quantum measurements in a fully shielded low-loss mode-shape engineered microwave cavity.

The product range features both the relatively compact QCage.24 for versatile and flexible microwave measurements and the upscaled QCage.64 for operating quantum processors with up to 30 qubits. Both products feature the same sample holder concept that encloses the chip in an all-surrounding microwave cavity. By careful engineering, the design has been optimized to offer both superior qubit performance and a seamless workflow in the lab going from fabrication through wire bonding and device prescreening and all the way to full stack quantum computer integration.

What are the highlights?

  • Sample chip suspended in cavity to minimize losses and decoherence.
  • Low loss PCB with embedded coplanar transmission lines for signal integrity.
  • Cavity and PCB optimized for resonance free transmission.
  • EMC tight superconducting shielding enclosure.

Benchmarking data from several leading quantum labs have shown that the QCage chip carrier offers a unique low loss environment for operating superconducting resonators with Q factors as high as 200 million and transmon qubits with coherence times of longer than 200 microseconds.

The superior performance in combination with the flexibility for establishing an easy workflow makes the QCage an extremely powerful tool for a seamless high performance integration of superconducting quantum processors to the full stack.

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