Review of qubit-based quantum sensing

Alyx Wilhelm, Nicolas Wanner, Archana T. Anilkumar +3 more

Boris Kantsepolsky, Itzhak Aviv, Ruti Gafni +2 more

Manisha Prajapat, Kamal Kishor Choure, Gausia Qazi +3 more

In the later years, the quantum sensor is considered to be one of the key techniques for the next generation of sensors and provides a new paradigm for sensing technology. Within the realm of quantum technology, Quantum sensing is a rapidly growing research subject that focuses on spin qubits, trapped ions, and flux qubits as the most prevalent platforms. Quantum sensors and quantum sensing techniques based on integrated quantum photonics serve as the foundation for the realization of these next-generation sensing. The paper presents a brief review of quantum sensor techniques, applications, and recent advancements in the domain of quantum sensors over the last few years.

Ning Wang

Magnetic nanoparticles have wide applications in various fields, e.g., magnetic recording in information science, magnetic resonance imaging, and magnetic therapy in bio-medicine. In this chapter, we will review recent applications of magnetic nanoparticles or magnetic complexes in the cutting-edge field of quantum sensing, especially in hybrid quantum sensing. Quantum sensing is a quantum technology for ultrasensitive detection, which is particularly useful for sensing weak signals at the nanoscale. The quantum systems that offer unprecedented sensitivity, resolution, and/or flexibility include superconducting qubits, defect centers in solids, atomic vapors, cold atoms, and so on. Usually, they have spin properties and possess excellent magnetic-field sensitivity; but they are insensitive to temperature, electric field, pressure, etc., and even immune to some bio-parameters (e.g., pH and glucose concentration). Recently, hybrid quantum sensing has offered new possibilities. By converting the insensitive or immune parameters into magnetic signals, the range of detectable parameters of quantum sensing can be broadened significantly. In this chapter, we first give a brief introduction to diamond quantum sensing, then review the applications of magnetic nanoparticles or magnetic complexes in diamond quantum sensing and nano-magnetism, and finally, discuss the potential applications and challenges for hybrid diamond quantum sensing.

Prineha Narang

Sergey Borisenok