How is information stored in the brain I believe information in computer is physically stored as a lattice of "boxes". Each box is either magnetized or de-magnetized. The computer reads this to retrieve and consolidate useful information. 

My question is at the cellular level, how is information stored. I have tried looking the topic up and read about the strengthening of synapses. However, what is the low level mechanism for storing information? There has to be some "state" of the cell that can be processed. 

By the way, so what is the physical mechanism behind each type of memory.
One hypothesis about the molecular basis of memory is CaMKII
Nature Reviews Neuroscience 13, 169-182 (March 2012) | doi:10.1038/nrn3192
Mechanisms of CaMKII action in long-term potentiation
http://www.silvalab.com/LMcourse/Lisman2012.pdf