13-18 September 2019
Europe/Warsaw timezone

Quantum Theory of the Classical

13 Sep 2019, 12:10
Aula Duża (Aditorium Maximum)

Aula Duża

Aditorium Maximum

ul. Krupnicza 33
ZAPROSZONY wykład plenarny Zaproszony wykład plenarny (P) Plenarna


Wojciech Żurek (Los Alamos National Laboratory, USA)


I will describe three insights into the transition from quantum to classical. After a brief discussion of decoherence I will give (i) a minimalist (and decoherence-free) derivation of preferred states. Such pointer states define events (e.g. measurement outcomes) without appealing to Born's rule. Probabilities and (ii) Born's rule then follows from the symmetries of entangled quantum states. With probabilities at hand one can analyze (iii) information flows from the system to the environment in course of decoherence. They result in "quantum Darwinism" that in turn explains how, as a result of selective proliferation of information, robust classical reality arises from the quantum substrate. Taken together, and in the right order, advances (i) - (iii) elucidate quantum origins of the classical by accounting for all the symptoms of objective existence of the preferred pointer states of quantum systems through the redundancy of their records in the environment.

Primary author

Wojciech Żurek (Los Alamos National Laboratory, USA)

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