Alex Kamenev

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Classical population dynamics models exhibit a continuous phase transition between an extinct (absorbing) state and a state with a finite population. The most common and robust universality class of such transitions is known as directed percolation (DP). In this talk I'll argue that there is a natural and well-defined way to generalize population models to allow for coherent superpositions
of live and dead creatures - i.e. Schrodinger cats. Such quantum populations may also undergo transitions between dead and live states, which belong to a distinct universality class -- quanum DP. I will discuss a field theory of QDP, its epsilon-expansion treatment and its possible applications to qubit arrays.

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University of Minnesota
InnoDom Cologne, Weyertal 109, 50931 Köln join online
Contact: Sebastian Diehl, Simon Trebst