Actually, there is a similarity between quantum entanglement and quantum complimentarity. As you may know, observing anything in the quantum realm is fruitless as a measure of truth since the very act of observation (as it is used in empirical scientific studies) fixes the system being studied in time and the uncertainties and possibilities associated with its dynamical behavior patterns become regularized and known.
Quantum realities and outcomes are always an unknown, although non-linear mathematics can render approximations and probabilities regarding outcomes. The new field of quantum computing is based upon these assumptions, Entanglements define the mingling of systems such that their timelines become linked in time and space and they lose their uniqueness in that they become changed throughout time and space through their interactions. Therefore outcomes and predictions of them become more difficult with the local passage of time.
Complimentarity is a fact that each particle or wave in the quantum realm has a twin somewhere in the universe that will change simultaneousy
in a non-local place as soon as its twin is changed in a local place. This is also a basis in the field of quantum computing. It will be interesting to see how this develps in the future as this field of study is only about ten years old. A far cry from what Heisenberg and Schrodinger taught us regarding the basics of quantum matters at the beginning of the 20th century.
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