In quantum sensing, one uses the properties of a quantum system such as energy quantization, interference, or entanglement to detect and measure physical quantities of other systems. The goal is to achieve higher sensitivity, precision, and resolution than what is possible using standard (non quantum) devices. For that, one exploits the high sensitivity quantum states have to external perturbations.
In quantum sensing, one uses the properties of a quantum system such as energy quantization, interference, or entanglement to detect and measure physical quantities of other systems. The goal is to achieve higher sensitivity, precision, and resolution than what is possible using standard (non quantum) devices. For that, one exploits the high sensitivity quantum states have to external perturbations.
A fundamental aspect of quantum systems lies in their extreme sensitivity to external perturbations. This characteristic, which generally represents a considerable challenge for physicists seeking to isolate these systems in order to observe their quantum properties, can actually be transformed into an advantage. Indeed, this intrinsic sensitivity makes quantum systems ideal candidates for high-precision metrology. Quantum sensors exploit this susceptibility to measure physical quantities with precision difficult to match with classical approaches.
Quantum sensing leverages the properties of quantum systems-such as energy quantization, superposition, and entanglement -to achieve sensitive measurements.[1] Quantum sensors can be based on various platforms, such as photons, cold atoms, solid-state spin qubits, and superconducting circuits, for different applications.Over the last decade, quantum sensing has not only opened new avenues for precision measurement in various scientific domains [2,3] but also made remarkable breakthroughs in biomedical, navigation, energy, and other applications.[4-6] To enhance the benefits of quantum sensing, it is crucial to address challenges related to materials [7] and system engineering [8] to improve sensitivity, reliability, and real-time monitoring.Current research efforts span a diverse range of scientific and technological advancements to address these issues and enable new applications.The Special Issue "Quantum Sensing," edited by Tongcang Li, Renbao Liu, and Chong Zu, features 2 review articles and 13 original articles, reporting the latest advancements in the field.This
This paper explores the potential of quantum isotopes as the foundation for developing high-precision and high-sensitivity quantum sensors. Traditional sensors are often limited by inherent noise and fundamental physical constraints, hindering their ability to measure extremely small physical quantities with high accuracy. Quantum isotopes, possessing unique properties derived from their nuclear structure – specifically, their quantized spin or nuclear energy levels – offer a pathway to overcome these limitations. This work details the theoretical framework for leveraging these isotopes in sensor design, focusing on utilizing their inherent sensitivity to external forces and fields. The proposed approach relies on the precise measurement of shifts in these energy levels, providing a mechanism for detecting and quantifying weak interactions. The core claim of this research is the ability to construct highly accurate and sensitive quantum sensors through the exploitation of quantum isotopic characteristics. This paper outlines the key principles, potential applications, and the anticipated advancements enabled by this technology. ---
Quantum sensing, using quantum properties of sensors, can enhance resolution, precision, and sensitivity of imaging, spectroscopy, and detection. An intriguing question is: Can the quantum nature (quantumness) of sensors and targets be exploited to enable schemes that are not possible for classical probes or classical targets? Here we show that measurement of the quantum correlations of a quantum target indeed allows for sensing schemes that have no classical counterparts. As a concrete example, in the case that the second-order classical correlation of a quantum target could be totally concealed by non-stationary classical noise, the higher-order quantum correlations can single out a quantum target from the classical noise background, regardless of the spectrum, statistics, or intensity of the noise. Hence a classical-noise-free sensing scheme is proposed. This finding suggests that the quantumness of sensors and targets is still to be explored to realize the full potential of quantum sensing. New opportunities include sensitivity beyond classical approaches, non-classical correlations as a new approach to quantum many-body physics, loophole-free tests of the quantum foundation, et cetera.
Quantum sensing is a rapidly growing approach to probe fundamental physics and explore new phase space for possible new physics with precision and highly sensitive measurements in our quest to understand the deep structure of matter and its interactions. This field uses properties of quantum mechanics in the detectors to go beyond traditional measurement techniques. Key particle physics topics where quantum sensing can play a vital role include neutrino properties, tests of fundamental symmetries (Lorentz invariance and the equivalence principle as well as searches for electric dipole moments and possible variations in fundamental constants), the search for dark matter and testing ideas about the nature of dark energy. Interesting new sensor technologies include atom interferometry, optomechanical devices, and atomic and nuclear clocks including with entanglement. This Perspective explores the opportunities for these technologies in future particle physics experiments, opening new windows on the structure of the Universe.
This paper investigates the potential of multi-parameter quantum state control for enhancing the performance of quantum sensors. The core claim centers on leveraging precisely controlled quantum states to achieve highly accurate measurements of multiple physical parameters simultaneously. The proposed mechanism involves manipulating quantum states with multiple parameters, allowing for correlated measurements and improved sensitivity. This work explores theoretical frameworks and outlines a strategy for developing quantum sensors that benefit from this approach. The paper focuses on the design principles and challenges associated with implementing such a system, emphasizing the role of quantum entanglement and coherence in achieving high precision. The ultimate goal is to demonstrate how multi-parameter quantum state control can unlock new possibilities for quantum sensing applications, particularly in areas demanding simultaneous measurement of diverse physical quantities. This research contributes to the growing field of quantum sensing by proposing a novel method that could significantly improve sensor accuracy and expand its capabilities.