Deterministically addressing spins at clock transitions with a frequency- and bandwidth-tunable superconducting resonator

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Abstract
Spins in solids could provide long-lived memories for superconducting quantum computers, but practical devices need a microwave interface that remains tunable in a magnetic field. This study develops a superconducting resonator with adjustable frequency and bandwidth to address bismuth spins in silicon at a clock transition, where they are less sensitive to magnetic noise. The authors measure quantum coherence lasting nearly half a second and show that tuning the resonator can suppress the spins' microwave echoes. These capabilities provide building blocks for controlling the storage and retrieval of quantum information in spin-based memories.
Funding Information
  • AIDAS joint laboratory

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