Abstract: I present some exact results in vector-like and chiral gauge theories. They can be solved exactly when supersymmetric gauge theories are perturbed by anomaly-mediated supersymmetry breaking (AMSB), thanks to the UV-insensitivity of AMSB. For vector-like SO and Sp gauge theories, a wide variety of Seiberg’s results collapse to simple chiral symmetry breaking. They appear to connect to non-SUSY limits … Read More
It is generally expected that during the black hole evaporation process, correlations within the Hawking radiation first start to grow at a time scale called the Page time. The information of a diary thrown into the black hole is also expected to become accessible from the radiation at the Page time. These expectations are based on averages over Haar-random pure … Read More
Abstract: The vacuum-to-vacuum genus-zero string graph is expected to be related to the thermodynamics of the target spacetime, and is thus an interesting quantity to compute. However, this quantity is very confusing in critical string theory. In order to understand it better, we compute the vacuum sphere partition function in noncritical string theory in the semiclassical limit, where a saddle point approximation … Read More
https://berkeley.zoom.us/j/92148470378
Abstract: Does gravity constrain computation? We study this question usingthe AdS/CFT correspondence, where computation in the presence ofgravity can be related to non-gravitational physics in the boundary theory. In AdS/CFT, computations which happen locally in the bulk areimplemented in a particular non-local form in the boundary, which ingeneral requires distributed entanglement. In more detail, we recall thatfor a large class … Read More
Abstract: I will discuss a working progress with Douglas Stanford to address the typical state firewall paradox. https://berkeley.zoom.us/j/92148470378
Abstract: It has been proposed in the literature that the volume of Einstein–Rosen bridge is equal to complexity of state preparation (”Complexity=Volume” conjecture). Taking this statement outside the horizon, one might be tempted to propose ”Complexity=Time” correspondence. In this talk I argue that in a blockchain protocol, which is the foundation of all modern cryptocurrencies, time is emergent and it … Read More
Abstract: I will discuss work in progress with Shenker, Stanford, Yang, and Yao focused on understanding certain universal aspects of spacetime wormholes at late times. In particular, we focus on the late time behavior of the spectral form factor, making an analogy with the explanation of these features in semiclassical periodic orbit theory. For semiclassical periodic orbits, the spectral form … Read More
Abstract: I will discuss ongoing work on studying operator algebras in semiclassical gravity. In AdS/CFT, the large N limit of single-trace operators in the boundary CFT results in a type 3 von Neumann algebra. Including 1/N corrections promotes the algebra to type 2, which allows the von Neumann entropy to be defined and calculated. I will describe how this works … Read More
Abstract: The Distance Conjecture holds that any infinite-distance limit in the scalar field moduli space of a consistent theory of quantum gravity must be accompanied by a tower of light particles whose masses scale exponentially with proper field distance $||\phi||$ as $m \sim \exp(- \lambda ||\phi||)$, where $\lambda$ is order-one in Planck units. While the evidence for this conjecture is formidable, … Read More