remain secret = is not lost to the environment yet

— Me@2013-01-03 11:07:30 AM

The no-cloning theorem is a result of quantum mechanics that forbids the creation of identical copies of an arbitrary unknown quantum state.

— Wikipedia on No-cloning theorem

[guess]

conservation of information

= you can only move, but not copy, a piece of information

Classical information can be copied because “identical” classical systems are not really identical if we consider their microscopic details. One macrostate can be corresponding to a lot of microstates, e.g.

4 = 1 + 1 + 2

4 = 1 + 3 + 0

copy one macrostate = find another microstate which is corresponding to the same macrostate

Whether two states are “identical” depends on the resolution of the observer.

[guess]

— Me@2013-01-03 11:07:30 AM

2013.01.04 Friday (c) All rights reserved by ACHK