Ruth:I looked at the brief summary but not yet at the journal article. However it sounds as though they created a superposition of two quantum states of the EM field, where the two states were of different number of quanta (photons). So for example (using smaller numbers), you can think of one state as a state of 10 quanta and the other as a state of 20, which looks like > > 1/sqrt 2 [ |10> + |20> ]-Welcome back. I don't see that bigger is better. It is like "my Dad is better than your Dad". Does it really prove anything different than we understood before? Why do they bother to do things like this? But referring to your theory I think I can understand it better.