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PhotonicsViews

Robust, compact quantum sensors to deliver unprecedented precision

Katrin Kobe

Published Jan 16, 2024• 0 citations
Publisher

Abstract

Abstract Quantum sensing may be less well known than quantum computing but its impact on our world may be just as significant. Quantum sensors promise accuracy 1,000 times greater than that provided by today's conventional sensors, opening up new applications in medicine, navigation and more. Quantum sensing is also closer to market readiness than quantum computing.

DOI
10.1002/phvs.202400003

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Abstract Quantum sensing may be less well known than quantum computing but its impact on our world may be just as significant. Quantum sensors promise accuracy 1,000 times greater than that provided by today's conventional sensors, opening up new applications in medicine, navigation and more. Quantum sensing is also closer to market readiness than quantum computing.
Quantum sensing is the most exciting quantum technology and it has the most potential to change our lives in the next decade and beyond. Quantum sensors will offer new capabilities with benefits for medicine, defense, intelligence, extractive industries and many others. Quantum sensing is a precursor technology to quantum computing and communications. Quantum sensors use quantum properties and effects to measure or sense physical things. This chapter explores quantum sensing as a topic in its own right, because the capabilities of quantum sensing are surprising and offer new forms of knowledge discovery and at new levels of analysis. Furthermore quantum sensors are here today---indeed, they have been in use for more than fifty years.
The current rise of quantum technology is compelled by quantum sensing research. Thousands of research labs are developing and testing a broad range of sensor prototypes. However, there is a lack of knowledge about specific applications and real-world use cases where the benefits of these sensors will be most pronounced. This study presents a comprehensive review of quantum sensing state-of-practice. It also provides a detailed analysis of how quantum sensing overcomes the existing limitations of sensor-driven systems’ precision and performance. Based on the review of over 500 quantum sensor prototype reports, we determined four groups of quantum sensors and discussed their readiness for commercial usage. We concluded that quantum magnetometry and quantum optics are the most advanced sensing technologies with empirically proven results. In turn, quantum timing and kinetics are still in the early stages of practical validation. In addition, we defined four systems domains in which quantum sensors offer a solution for existing limitations of conventional sensing technologies. These domains are 1) GPS-free positioning and navigating services, 2) time-based operations, 3) topological visibility, and 4) environment detection, prediction, and modeling. Finally, we discussed the current constraints of quantum sensing technologies and offered directions for future research.
Quantum sensors have revolutionized the field of precision measurement by exploiting quantum coherence, entanglement, and interference. These sensors offer unprecedented sensitivity in measuring time, magnetic and electric fields, acceleration, and gravitational forces. Recent developments in atomic clocks, nitrogen-vacancy (NV) center magnetometers, and optomechanical devices have shown significant enhancements in performance. This paper explores the fundamental principles behind quantum sensors, key technological advancements, and real-world applications ranging from navigation to medical imaging and gravitational wave detection.
Quantum technologies are at the cusp of a new technological revolution, with quantum computing and quantum sensing emerging as two of its most transformative domains. This review paper provides an in-depth analysis of these fields, exploring their fundamental principles, hardware implementations, and the challenges that hinder their widespread adoption. Quantum computing, leveraging superposition and entanglement, promises to solve intractable computational problems in areas like drug discovery, materials science, and cryptography. Concurrently, quantum sensing exploits the inherent sensitivity of quantum systems to external perturbations, enabling unprecedented precision in metrology, medical diagnostics, and navigation. We delve into the diverse hardware platforms for each field, including superconducting qubits, trapped ions, NV centers in diamond, and cold atoms. A central theme of this review is the symbiotic relationship between quantum computing and quantum sensing, illustrating how advancements in one area directly accelerate progress in the other. Finally, we discuss the current state of the art, identify key technical and engineering challenges, and provide an outlook on future directions and potential societal impacts.
The future in sensor development will largely profit from adapting quantum technologies as a key enabler for pushing achievable detection limits and absolute accuracy in measurement to the ultimate limit. With the onset of the second quantum revolution, advanced quantum physics took its way out of university laboratories to research labs of tech companies, where physicists and engineers translate large tabletop quantum experiments into compact, robust and high-quality quantum measurement devices, scalable to high production volumes. The industrialization of such innovative sensing products requires both competitive price and fulfillment of size, weight, and power constraints. This enables applications ranging from magnetometers revolutionizing cardiac diagnostic to sensors allowing GPS-free navigation.