Generic emergence of objectivity in position basis

The emergence of an objective classical world from the quantum behavior of microscopic constituents has long puzzled physicists. The quantum decoherence paradigm—particularly through quantum Darwinism and spectrum broadcast structures—seeks to explain this transition within standard quantum mechanics. However, existing models often assume a preferred basis for interactions, an assumption that is not always well justified. Notably, classical reality manifests in the position basis, raising the question: Is position fundamentally favored by nature as the preferred basis? I will present a simple no-go result demonstrating that interactions between internal degrees of freedom inevitably disturb spatial degrees of freedom. This unavoidable disturbance leads to the objective encoding of positional information, even in purely spin-spin interactions, reinforcing the privileged role of position in the emergence of classical objectivity.

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This is a hybrid event:
Room D, the Institute of Physics PAS, Al. Lotników 32/46

Online: Zoom Link, (Passcode: 134595, Meeting ID: 823 8038 0442)

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