Month: September 2022

Emergence illustrated. View in LinkedIn

A BIT OF EVERYTHING. “The Hawking radiation is entangled with Hawking "partners." If these are trapped inside the black hole, and if the black hole evaporates completely without release of the quantum information associated with the Hawking "partners", an initial pure state would not evolve into a pure state as determined by observers who remain outside the black hole.” https://lnkd.in/dUKnus8 View in LinkedIn

IMPENETRABLE ONE WAY TRIP. “This black hole "information paradox" is based on the classical notion of a black hole event horizon sealing off any causal influence from inside the black hole on observers who remain outside the event horizon.” https://lnkd.in/dUKnus8 View in LinkedIn

INFORMATION PARADOX. “Quantum information falling across the event horizon is swallowed up by a singularity or disappears into a "baby universe", unless it can propagate acausally. Could it somehow all remain on or outside the event horizon even as the quantum fields propagate into the black hole?” https://lnkd.in/dUKnus8 View in LinkedIn

GUESTS ARRIVING AT A PARTY. “If the late Hawking radiation is entangled with early Hawking radiation rather than with Hawking "partners" inside the horizon, purifying the state for external observers, there are predictions of a "firewall" along the event horizon.” https://lnkd.in/dUKnus8 View in LinkedIn

CONTRADICTIONS. “The existence of a black hole event horizon depends on energy conditions that, while reasonable in a classical context, are known to be violated in quantum field theory.” https://lnkd.in/dUKnus8 View in LinkedIn

CONTRADICTIONS WHERE BOTH ARE TRUE. “Despite this, there is a tacit assumption in most of the literature that an event horizon with an interior singularity is a general property of quantum as well as classical black holes.” https://lnkd.in/dUKnus8 View in LinkedIn

VERY ADVANCED THOUGHT. “This book is about the geometry of linguistic meaning. If spacial concepts play a crucial role in linguistic meaning, then geometry ought to be a useful way to describe these meanings.” (Emeritus Professor Paul Chilton, Lancaster University UK). https://lnkd.in/d7GVbDg View in LinkedIn

Lime tree seeds on their little helicopters: the truimph of hope over experience, for the majority of these time capsules to another world perish. View in LinkedIn

CLASSIC + QUANTUM BLACK HOLES. “This has led some to propose a drastic quantum modification of the spacetime to prevent formation of a black hole horizon (fuzzballs, gravastars, etc.), even though quantum corrections naively should scale as h/ M 2 (units G = c = 1 ), which is incredibly small in the vicinity of the horizon of a large black hole.” https://lnkd.in/dUKnus8 View in LinkedIn