“Quantum sensing” describes the use of a quantum system, quantum properties, or quantum
phenomena to perform a measurement of a physical quantity. Historical examples of …

Optical atomic clocks represent the state of the art in the frontier of modern measurement
science. In this article a detailed review on the development of optical atomic clocks that are …

Quantum technologies exploit entanglement to revolutionize computing, measurements, and
communications. This has stimulated the research in different areas of physics to engineer …

Enhancing the precision of measurements by harnessing entanglement is a long-sought
goal in quantum metrology,. Yet attaining the best sensitivity allowed by quantum theory in …

This paper reviews quantum spin squeezing, which characterizes the sensitivity of a state
with respect to SU (2) rotations, and is significant for both entanglement detection and high …

Variations in continental volcanic arc emissions have the potential to control atmospheric
carbon dioxide (CO2) levels and climate change on multimillion-year time scales. Here we …

Many-particle entanglement is a fundamental concept of quantum physics that still presents
conceptual challenges. Although nonclassical states of atomic ensembles were used to …

We propose an approach to quantum phase estimation that can attain precision near the
Heisenberg limit without requiring single-particle-resolved state detection. We show that the …

A major challenge in quantum metrology is the generation of entangled states with a
macroscopic atom number. Here, we demonstrate experimentally that atomic squeezing …

Characterizing many-body systems through the quantum correlations between their
constituent particles is a major goal of quantum physics. Although entanglement is routinely …