Scalable, high-fidelity quantum-state readout remains a central challenge in the development of large-scale superconducting quantum processors. Conventional dispersive readout architectures depend on bulky isolators and external amplifiers, introducing significant hardware overhead and limiting opportunities for on-chip information processing. In this work, we propose an approach that embeds a superconducting nonlinear asymmetric inductive element (SNAIL) into the readout chain, enabling coherent and directional processing of readout signals directly on-chip. This embedded SNAIL platform allows frequency-multiplexed resonators to interact through engineered couplings, forming a tunable readout-amplifier-output architecture that can manipulate quantum readout data in situ. Through theoretical modeling and numerical optimization, we show that this platform enhances fidelity, suppresses measurement-induced decoherence, and simplifies hardware complexity. These results establish the hybridized SNAIL as a promising building block for scalable and coherent quantum-state readout in next-generation processors.

Close

PrevNext

View figure in article

• Circuit quantum electrodynamics
• Quantum control
• Quantum information with solid state qubits
• Squeezing of quantum noise
• Superconducting quantum optics
• Optical parametric oscillators & amplifiers
• Superconducting devices
• Microwave techniques