Spatial and temporal variations of fundamental constants
نویسندگان
چکیده
منابع مشابه
Atomic Clocks and Constraints on Variations of Fundamental Constants
Fundamental constants play an important role in modern physics, being landmarks that designate different areas. We call them constants, however, as long as we only consider minor variations with the cosmological time/space scale, their constancy is an experimental fact rather than a basic theoretical principle. Modern theories unifying gravity with electromagnetic, weak, and strong interactions...
متن کاملLaboratory Limits on Temporal Variations of Fundamental Constants: An Update. arXiv preprint physics/0611088
Precision comparisons of different atomic frequency standards over a period of a few years can be used for a sensitive search for temporal variations of fundamental constants. We present recent frequency measurements of the 688 THz transition in the 171 Yb + ion. For this transition frequency a record over six years is now available, showing that a possible frequency drift relative to a cesium ...
متن کاملAssessment of Spatial and Temporal Variations in Water Quality Dynamics of River Ganga in Varanasi
River Ganga is one of the prime sacred National Rivers of India, closely associated with economic, social, and cultural heritage of Indian people. Recently, it has been subjected to immense degradation and pollution as a result of receiving huge amounts of domestic and industrial wastewater as well as religious ritual activities and surface runoff. The present study attempts to study spatial an...
متن کاملAssessment of Spatial and Temporal Variations in Water Quality Dynamics of River Ganga in Varanasi
River Ganga is one of the prime sacred National Rivers of India, closely associated with economic, social, and cultural heritage of Indian people. Recently, it has been subjected to immense degradation and pollution as a result of receiving huge amounts of domestic and industrial wastewater as well as religious ritual activities and surface runoff. The present study attempts to study spatial an...
متن کاملSome possibilities for laboratory searches for variations of fundamental constants
We consider different options for the search for possible variations of the fundamental constants. We give a brief overview of the results obtained with several methods. We discuss their advantages and disadvantages with respect to simultaneous variations of all constants in both time and space in the range 10 − 10 yr. We also suggest a few possibilities for the laboratory search. Particularly,...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2009
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921310009531