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# Quantum Gravity and Black Holes

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Tensor networks provide toy models which explicitly realize many puzzling features of AdS/CFT correspondence, and are sometimes treated as the lossy descriptions of the skeleton (in the AdS scale) of

The Simons Foundation is pleased to announce the establishment of two Simons Collaborations in Mathematics and the Physical Sciences: the Simons Collaboration on Homological Mirror Symmetry, directed by Tony Pantev, University of Pennsylvania, and the Simons Collaboration on It from Qubit:

A basic question in black hole horizon physics the leading breakdown of the low-energy description in terms of quantum fields and general relativity (collectively known as effective field theory). Although black hole horizons are weakly curved, because of long time-evolution large energies build

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Nov 18 2016

After the historic announcement of the discovery of gravitational waves from merging black holes by LIGO, Peter Graham answered questions on the discovery and gravitational waves in general at

Aug 31 2016

The first It From Qubit collaboration workshop and summer school was held at the Perimeter Institute in

Dec 30 2015

If a pebble is thrown into a black hole, an observer outside the black hole will see waves of energy diffuse outwards along the event horizon.

Nov 30 2015

In 1974, Hawking put forward the notion that black holes are not truly ‘black’. Instead, a black hole continuously burns and emits all of its mass in the form of thermal radiation. In recent years progress has been made in understanding this burning process.

Nov 16 2015

Many physicists believe that entanglement is the essence of quantum weirdness — and some now suspect that it may also be the essence of space-time geometry.

Oct 27 2015

Circumventing a no-go theorem established in 1977 by nonlinearly realized supersymmetry, the authors construct for the first time a pure (without additional fields) N=1 supergravity with positive cosmological constant.

Apr 24 2015

A bold new idea aims to link two famously discordant descriptions of nature. In doing so, it may also reveal how space-time owes its existence to the spooky connections of quantum information.