From Vilasini:
Hi all,
This week we have a visitor, Ämin Baumeler from IQOQI, Vienna who will be giving a seminar on “Logical limits on correlations and causal structures” at 4pm on Thursday, 2nd of December at HIT E 41.1. The abstract is as attached below. It would be a blackboard talk but I will aim to stream it live (and also record it) at the following zoom link, for those who would be interested in attending online. https://ethz.zoom.us/j/66298777504
Title: Logical limits on correlations and causal structures
Abstract: The self-consistency principle stipulates that the only solutions to physical laws that occur locally are those that are self-consistent. In this talk, after a discussion of this principle, I present several consequences. First, I show that in a classical setting a violation of this principle not only encompasses what colloquially is known as the grandparent paradox, but also that this paradox is equivalent to the information paradox (with E. Tselentis, QPL 2020, 10.4204/EPTCS.340.1). Second, I present self-consistent multi-party correlations inspired by Bell, Ardehali, and Svetlichny that violate causal order to an unbounded degree (with A. S. Gilani and J. Rashid, arXiv:2004.12921 [quant-ph]). Finally, I discuss some recent characterizations of self-consistent and inconsistent causal structures (with E. Tselentis, work in progress).
Best regards, Vilasini