Reconstruction of bulk operators within the causal wedge is
simple to achieve using Lorentzian causal bulk dynamics. In
contrast, the only known methods for reconstructing arbitrary
operators in the full entanglement wedge (the Petz map,
What is the role of quantum extremal surfaces (QES) in general
quantum error-correcting codes? I will present preliminary results
starting to answer this question, expanding on the previous work of
Harlow, providing necessary and sufficient...
I will present a holographic framework for reconstructing the
experience of bulk observers in AdS/CFT. In particular, I will show
how to recover the proper time and energy distribution measured
along bulk worldlines, directly in the CFT via a...
The talk will consist of some general observations about energy
inequalities, such as the statement that the energy density
averaged over a time-like curve is bounded below and the statement
that the averaged null energy on a null geodesic in...
Expander graphs in general, and Ramanujan graphs in particular,
have played an important role in computer science and pure
mathematics in the last four decades. In recent years the area of
high dimensional expanders (i.e. simplical complexes with...
We will comment on wormholes for the off-diagonal components of
the density matrix of Hawking radiation. Then we will discuss work
in progress on a simple model in which small effects associated
with unitarity of time evolution may be related to...
The quest to build and probe toy models of quantum gravity in
table-top experiments presents a new frontier for the field of
quantum simulation. One challenge is to simulate fast scrambling of
quantum information in black holes, for which a key...
We start by describing how generalized symmetries in QFT arise
in the violation of elementary properties that appear when we
associate algebras to regions in QFT. This observation provides a
new perspective/proof of the abelian nature of generalized...
I will discuss recent progress in understanding quantum gravity
amplitudes (partition function, boundary correlation functions and
multiboundary amplitudes) in Liouville gravity, and how they limit
to Jackiw-Teitelboim (JT) amplitudes. I will...
A recent line of work has focused on the following question: Can
one prove strong unconditional lower bounds on the number of
samples needed for learning under memory constraints? We study an
extractor-based approach to proving such bounds for a...