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The International System of Units, the SI, provides the foundation for all measurements in science, engineering, economics, and society. The SI has been fundamentally revised in 2019. The new SI is a universal and highly stable unit system based on invariable constants of nature. Its implementation rests on quantum metrology and quantum standards, which base measurements on the manipulation and counting of single quantum objects, such as electrons, photons, ions, and flux quanta. This book explains and illustrates the new SI, its impact on measurements, and the quantum metrology and quantum technology behind it.
The book is based on the book ?Quantum Metrology: Foundation of Units and Measurements? by the same authors.
From the contents:

-Measurement
-The SI (Système International d?Unités)
-Realization of the SI Second: Thermal Beam Cs Clock, Laser Cooling, and the Cs Fountain Clock
-Flux Quanta, Josephson Effect, and the SI Volt
-Quantum Hall Effect, the SI Ohm, and the SI Farad
-Single-Charge Transfer Devices and the SI Ampere
-The SI Kilogram, the Mole, and the Planck constant
-The SI Kelvin and the Boltzmann Constant
-Beyond the present SI: Optical Clocks and Quantum Radiometry
-Outlook

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Foreword
Preface
List of Abbreviations
INTRODUCTION
BASICS
Measurement
The SI (Système International d´Unités)
LASER COOLING, ATOMIC CLOCKS, AND THE SECOND
Techniques for Laser Cooling
The Cs-Fountain Clock
Optical Clocks
SUPERCONDUCTIVITY, JOSEPHSON EFFECT, AND FLUX QUANTA
Josephson Effect and Quantum Voltage Standards
Flux Quanta and Superconducting Quantum Interference Devices
QUANTUM HALL EFFECT
Basic Physics of Three- and Two Dimensional Semiconductors
Two-Dimensional Electron Systems in Real Semiconductors
The Hall Effect
Quantum Hall Resistance Standards
SINGLE-CHARGE TRANSFER DEVICES AND THE NEW AMPERE
Basic Physics of Single-Electron Transport
Quantized Current Sources
Consistency Tests: Quantum Metrology Triangle
PLANCK CONSTANT, THE NEW KILOGRAM, AND THE MOLE
The Avogadro ExperimentThe Watt Balance Experiment
The Mole, Unit of Amount of Susbstance
BOLTZMANN CONSTANT AND THE NEW KELVIN
Primary Thermometers
Realization and Disseminiation of the New Kelvin
SINGLE-PHOTON METROLOGY AND QUANTUM RADIOMETRY
Single-Photon Sources
Single-Photon Detectors
Metrological Challenges

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