Single-ion microwave near-field quantum sensor

Abstract

We develop an intuitive model of 2D microwave near-fields in the unusual regime of centimeter waves localized to tens of microns. Close to an intensity minimum, a simple effective description emerges with five parameters which characterize the strength and spatial orientation of the zero and first order terms of the near-field, as well as the field polarization. Such a field configuration is realized in a microfabricated planar structure with an integrated microwave conductor operating near 1 GHz. We use a single 9Be+ ion as a high-resolution quantum sensor to measure the field distribution through energy shifts in its hyperfine structure. We find agreement with simulations at the sub-micron and few-degree level. Our findings give a clear and general picture of the basic properties of oscillatory 2D near-fields with applications in quantum information processing, neutral atom trapping and manipulation, chip-scale atomic clocks, and integrated microwave circuits.

References in corpus (9)

• Trapped-ion quantum logic gates based on oscillating magnetic fields
• Ion traps with enhanced optical and physical access
• Microwave potentials and optimal control for robust quantum gates on an atom chip
• Design, Fabrication, and Experimental Demonstration of Junction Surface Ion Traps
• Imaging of microwave fields using ultracold atoms
• Ball-grid array architecture for microfabricated ion traps
• Microwave Near-Field Quantum Control of Trapped Ions
• Generation of spin-motion entanglement in a trapped ion using long-wavelength radiation
• Spin waves and Collisional Frequency Shifts of a Trapped-Atom Clock

Cited by in corpus (10)

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• Multilayer ion trap technology for scalable quantum computing and quantum simulation
• High-Tc superconducting detector for highly-sensitive microwave magnetometry
• Multilayer ion trap with three-dimensional microwave circuitry for scalable quantum logic applications
• Cryogenic ion trap system for high-fidelity near-field microwave-driven quantum logic
• Radio-frequency sideband cooling and sympathetic cooling of trapped ions in a static magnetic field gradient
• Versatile control of ${}^9$Be${}^{+}$ ions using a spectrally tailored UV frequency comb
• Precise, super-resolving intensity measurement by quantum jump spectroscopy of a single neutral atom