Speaker
Description
We review several recent developments in the study of decoherence in the vicinity of black holes. In particular, we show that any quantum system in the vicinity of a black hole or cosmological horizon obeys a "second law" of nondecreasing decoherence, due to the presence of the horizon. In studying this phenomenon, we also develop a general formula for the relative Tomita operator between general coherent states, including those whose expected field does not vanish at the edge of the region under consideration. A relation to the entanglement capacity of black hole exteriors is discussed, which leads to an uncertainty relation between the entanglement capacity and the measured time since collapse, as seen by a stationary observer outside a black hole.
The last portion of my talk will be on our work, including a bonus I haven’t had a chance to talk with you about! But which I’ve just shared with Jan :). I can of course refrain from talking about our work if you or the others would rather wait until publication; in that case, I have other results the audience should find interesting and I’ll be happy to pare back the abstract. We can discuss at our next meeting.