This notation guide represents a compendium of gen- eral Physical Review The received date indicates the date the manuscript Physical Review Style and Notation Guide 3 In order to tackle Eq. (A5) we introduce the following sim- . 10−3 kilo k. 103 micro. µ. 10−6 mega. M. 106 nano n. 10−9 giga. G. 109 pico p.