A novel room temperature quantum sensor for magnetic fields

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Quantum optical magnetometers (QOM) are quantum magnetic sensors. They are leading candidates for mitigating challenges in magnetic sensing applications such as medical magnetic resonance imaging (MRI) and nuclear magnetic resonance (NMR) spectroscopy, e.g., for crude oil analysis and pharmaceutical development. Existing QOM have limited sensitivity. This limitation stems from the absence of suitable ultraviolet lasers, necessitating infrared-sensitive agents that degrade performance.We propose a new QOM approach, enabled by novel laser technology that we develop (powerful ultraviolet frequency comb lasers). This room temperature method is expected to greatly exceed state of the art magnetic sensing sensitivity, including that of cryogenic systems. Further improvement is anticipated by implementation of quantum protocols utilizing entanglement, such as spin squeezing.We will develop a prototype of this QOM and carry out proof of principle demonstrations of quantum magnetic sensing. The development process will also serve to train highly qualified personnel in the emerging field of quantum sensing. Furthermore, we will utilize the University of Alberta Technology Transfer Services for invention disclosures and as a liaison to industry partners in Alberta.Anticipated outcomes are enhanced capabilities in real-world settings, cost and footprint reduction, and alleviation of environmental constraints for applications that utilize magnetic sensors. These include medical MRI scanners and NMR spectrometers for oil analysis and pharmaceutical development.Furthermore, revenue would be generated through licensing and/or selling of the proposed technology. Finally, developing the quantum sensing and memory platform proposed here will strengthen Alberta's quantum ecosystem and leadership position in quantum technology.