## Recent Advances in Metrology and Fundamental Constants: Varenna on Lake Como, Villa Monastero, 25 July-4 August 2000Over the last decade of the 20th century, many improvements took place in the field of metrology and fundamental constants. These developments and improvements are discussed in this book. The old caesium SI second definition has found a new realization with the fountain approach, replacing the classical thermal atomic beam. The use of cold atom techniques, slowed down and cooled, has opened a number of unexpected avenues for metrology and fundamental constants, one of these possibilities being the atom interferometry. Another development was the demonstration of the possiblility of performing a direct frequency division in the visible, using short femtosecond pulses. Many other developments are also discussed. |

### What people are saying - Write a review

We haven't found any reviews in the usual places.

### Contents

T J QUINN The international system of units SI the last ten years | 3 |

History of the development of the SI | 4 |

The two classes of SI units | 6 |

The SI prefixes | 8 |

Units outside the SI | 9 |

T J QUINN The organization of metrology | 11 |

The metre convention | 13 |

The 21st CGPM | 16 |

B W PETLEY III The Planck constant | 157 |

B JECKELMANN The quantum Hall effect and its application in metrology | 263 |

MARK W KELLER Standards of current and capacitance based on single | 291 |

New applications | 317 |

K HELMERSON and W D PHILLIPS Cooling trapping and manipulation | 349 |

Deceleration and cooling of an atomic beam | 356 |

SubDoppler laser cooling | 367 |

J HELMCKE and F RIEHLE Physics behind the definition of the meter | 450 |

The broader organization of metrology | 20 |

International collaboration in metrology through regional cooperations | 22 |

The CIPM MRA | 23 |

Conclusions | 25 |

Mills Physical quantities and units | 27 |

Preamble | 28 |

Quantities | 30 |

Units | 31 |

Coherent systems of units | 33 |

Dimensions | 34 |

The SI prefixes | 38 |

On the number of independent base quantities and units | 39 |

Electromagnetic quantities and units | 41 |

S LESCHIUTTA Metrology and the logic of physics | 51 |

T J QUINN Measurement and society | 73 |

S LESCHIUTTA Education in metrology | 83 |

Nonlinear atom optics with BoseEinstein condensates | 84 |

B W PETLEY I The fundamental constants and physics | 93 |

B W PETLEY II The fundamental constants and metrology | 121 |

T J QUINN The Newtonian constant of gravitation G | 147 |

G WILKENING Optical and mechanical metrology | 495 |

G WILKENING Nanometrology | 519 |

N P Fox Developments in optical radiometry | 537 |

P WOLF Relativity and metrology pag | 575 |

P WOLF Relativity with clocks in space | 599 |

W BICH Estimation and uncertainty in metrology | 653 |

Propagation of distributions | 681 |

686 | |

Guide | 689 |

Models | 696 |

Predictive modellinga basic principle for model building | 704 |

SERGIENKO Quantum metrology with entangled photons | 715 |

T W HÄNSCH R HOLZWARTH J REICHERT and Th UDEM Measuring | 747 |

FORT F MINARDI M MODUGNO and M INGUSCIO Experiments with | 765 |

Ramseytype interferometer with BECs | 773 |

F T ARECCHI Chaos metrology and fundamental constants | 781 |

Phase slips ad the adaptive pacemaker | 803 |

Elenco dei partecipanti | 816 |

### Other editions - View all

### Common terms and phrases

accuracy allow applications array atoms base beam bodies calculated calibration cavity charge clocks compared comparisons considered constant Convention cooling defined definition density dependence described determined developed device direction discussed effect electric electron energy equations Equivalence error estimate example experimental experiments expressed field force frequency fundamental constants given gravitational IEEE important improved International Italy Josephson junctions laboratories laser length Lett light limit magnetic mass means Meas measurements method metre metrology microwave observed obtained operation optical parameters phase Phys physics possible potential practical present principle pump quantities quantum radiation range ratio realization reference relative resistance resonance respect shift shown shows signal spectral stability standards step temperature theory Trans transition trap uncertainty units University voltage wave