Quantum Darwinism versus spectrum broadcast structure

Together with birth of quantum mechanics a touchy question arised: How does Nature make a food-bridge from quantum substratum to the objective everyday world. The fact that this quantum-to-classical transition as yet not fully understood may mean that we have not grasped all the possible implications of the quantum formalism. I will consider the above problem in this context of two different approaches – quantum Darwinism and the so called spectrum broadcast structure which describe the emergence of classical objectivity from the quantum subjective world. Unfortunately the two approaches sometimes can lead to different predictions. However, an interesting attempt to relate the two frameworks in the common perspective has recently been made.