Recently it has been shown that quantum fields can be regular on the inner, Cauchy horizon of a rotating BTZ black hole, which appears to indicate a failure of strong cosmic censorship. We argue that, instead, what these results imply is that the inner horizon remains non-singular when leading-order backreaction of the quantum fields is computed, but, after next-order backreaction … Read More

Abstract: I will discuss several models of evaporating AdS black holes. In all models, it is possible to use the holographic entanglement entropy prescription to compute the dependence of entropy on time. In two cases, the dynamics are unitary, and a semiclassical calculation is sufficient to show this. In the third toy model, the dynamics are manifestly non-unitary; in this … Read More

Abstract: A fundamental issue in the AdS/CFT correspondence is the wormhole growth paradox. Susskind’s conjectured resolution of the paradox was to equate the volume of the wormhole with the circuit complexity of its dual quantum state in the CFT. We study the ramifications of this conjecture from a complexity-theoretic perspective. Specifically we give evidence for the existence of computationally pseudorandom … Read More

We discuss aspects of magnetically charged black holes in the Standard Model. For black holes smaller than a tennis ball, the electroweak symmetry is restored in the near horizon region. The lowest Landau level for the charged fermions leads to a large number effectively light degrees of freedom, which greatly enhance the effects of Hawking radiation. They are interesting primordial … Read More

Abstract: We argue that given holographic CFT1 in some state with a dual spacetime geometry M, and given some other holographic CFT2, we can find states of CFT2 whose dual geometries closely approximate arbitrarily large causal patches of M, provided that CFT1 and CFT2 can be non-trivially coupled at an interface. Our CFT2 states are “dressed up as” states of … Read More