
 Turns of Phrase: Qubit 
  qubit (pronounced exactly the same was as the Old Testament measurement, the cubit) is a “quantum bit”;, the analogue at quantum dimensions of the ordinary computer’s 1 or 0, on or off, heads or tails binary digit or bit. 
  Unlike such digital representations, a qubit remains in an indeterminate state until it is observed, like a tossed coin that is still spinning. 
  It was shown recently that in theory a quantum computer could solve certain mathematical problems, such as factoring large numbers, much faster than conventional ones, and so could be used, for example, in codebreaking. 
 www.worldwidewords.org /turnsofphrase/tpqub1.htm (199 words) 
