Poster Presentation 23rd International Society of Magnetic Resonance Conference 2023

Hybrid devices consisting of spin ensembles strongly coupled to microcavities have been proposed as a form of quantum memory. [1, 2] Practical implementations of this idea typically use superconducting microresonators to achieve the state of strong coupling – this is a result of confinement and high quality factors provided by superconducting microwave resonant circuits. Recently, a room-temperature implementation of this idea was proposed – in which the spin ensemble is continuously cooled by optical pumping, [3] but there has been no experimental demonstration of strong coupling between a spin ensemble and a microwave cavity at room temperature. Here we explore the use of planar inverse anapole microresonators [4] to achieve strong coupling with an ensemble of electron spins in the form of NV centers, and the potential use of such a strongly coupled system to realize a room-temperature quantum memory.

References:

1. Kubo al., “Strong Coupling of a Spin Ensemble to a Superconducting Resonator”, Phys. Rev. Lett., 2010, 105, 140502
2. Hughes al., “Coupling of Erbium-Implanted Silicon to a Superconducting Resonator”, Phys. Rev. App., 2021, 16, 034006
3. Zhang al., “Cavity Quantum Electrodynamics Effects with Nitrogen Vacancy Center Spins Coupled to Room Temperature Microwave Resonators”, Phys. Rev. Lett., 2022, 128, 253601
4. Abhyankar et. al., “Scalable microresonators for room-temperature detection of electron spin resonance from dilute, sub-nanoliter volume solids”, Science Advances, 2020, 6 (44), eabb0620