I'm sorry but i'm calling bullshit on your little soapbox rant there. Quantum essentially means a discrete amount. The size of the amount isn't the point, the nature of how it changes is.. i.e. its a leap or step from one value or state to another. There is no 1.5 quanta, you go from 1 quanta to 2 quanta.DanDanikov said:(Edit: Beaten to the punch, but only just) Firstly, I'd like to nip the misuse of 'quantum leap' in the bud there. As a fanciful TV show title which potentially created tiny changes in other people's lives at the right place to change things for the better, it was an apt title, but in general, people misuse that term so badly.
'Quantum' comes from the Latin word 'quantus', meaning 'how much', and was coined to represent a single unit of quantization of things in physics (an alternate was already in use- the Greek word 'atomos', meaning literally 'uncuttable', used by physicists to refer to atoms which they believed, at the time, to be the indivisible units of matter). This means a 'quantum leap' is the smallest change possible (although the idea that it has a potentially a huge effect wouldn't be going too wrong either). I haven't seen the phrase used in the mainstream media for quite some time as I'd like to hope and believe they've all been educated otherwise. 'Revolution' is certainly a far better term.
By all means, educate your friend and feel smarter in the process. I'll resist kicking other Escapist members in the shins until they become a repeat offender despite having been educated otherwise.
Now I'm off my little soap-box...
Thus using the term "quantum leap" is a perfectly sensible synonym for "step change" or "paradigm shift" in the sense that it implies a discontinuous change.
Edit:
http://www.thefreedictionary.com/quantum+leap
OP, your usage is legit, please correct your correction!! XDOakleighy said:EDIT: My apologies for the misuse of the term "quantum leap"