拥有中性锶原子的光学时钟,被认为是最有可能为“秒”作出重新定义的装置之一。鉴于它的频率将能更精确地确定(按照数量级),这种可能性大大增加。德国联邦物理技术研究院(PTB)的科学家们已为此奠定基础,他们首次测量了一个最重要的不确定性因素,即环境温度的影响。在此之前,环境温度的影响还只能从理论上推导。他们的研究结果已发表在最新一期的科学期刊《物理评论快报》上,很可能也会 Optical clocks with neutral strontium atoms are considered one of the most likely redefinitions for “seconds ”. This possibility is greatly increased given that its frequency will be able to be determined more accurately (on the order of magnitude). Scientists at the German Federal Institute of Physics and Technology (PTB) have laid the groundwork for the first time to measure one of the most important uncertainties, the effect of ambient temperature. Until then, the effect of ambient temperature can only be deduced theoretically. Their findings have been published in the latest issue of the scientific journal Physical Review Letters, most likely