Spatially Resolved Decoherence of Donor Spins in Silicon Strained by a Metallic Electrode
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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
Engineering topics
Morton, J. J. L.
Publications and source records attributed to Morton, J. J. L..
Multimode Storage of Quantum Microwave Fields in Electron Spins over 100 ms
In this work, we report long coherence times (up to 300 ms) for near-surface bismuth donor electron spins in silicon coupled to a superconducting microresonator, biased at a clock transition. This enables us to demonstrate the partial absorption of a train of weak microwave fields in the spin ensemble, their storage for 100 ms, and their retrieval, using a Hahn-echo-like protocol. Phase coherence and quantum statistics are preserved in the storage.
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSIC↗
Electron spin resonance spectroscopy with femtoliter detection volume
We report electron spin resonance measurements of donors in silicon at millikelvin temperatures using a superconducting LC planar micro-resonator and a Josephson parametric amplifier. The resonator includes a nanowire inductor, defining a femtoliter detection volume. Due to strain in the substrate, the donor resonance lines are heavily broadened. In this work, single-spin to photon coupling strengths up to ~ 3 kHz are observed. The single shot sensitivity is 120 ± 24 spins/Hahn echo, corresponding to ≈ 12 ± 3 spins / Hz for repeated acquisition.
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗