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Mixed-state entanglement as a diagnostic for quasiparticles and finite-T topological order
Quantum entanglement of pure states has led to new insights into a wide variety of topics. Entanglement of mixed states is however less well understood. In this talk I will...
Nov 09, 2020
Analytic calculation of the power spectrum covariance: speedup by four orders of magnitude
In order to infer cosmological parameters from galaxy survey data, we typically use summary statistics such as the power spectrum and we need an accurate estimate of their covariance matrix...
Nov 10, 2020
Is SMEFT Enough?
The four scalar degrees of freedom of the Standard Model, the Higgs and the longitudinal components of the Ws and Z, are amenable to different EFT descriptions. "SMEFT" wraps them...
Nov 10, 2020
Inside the Hologram: The bulk observer's experience
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...
Nov 10, 2020
Wave dark matter
A dark matter candidate lighter than about 30 eV exhibits wave behavior in a typical galactic environment. Examples include the QCD axion as well as other axion-like-particles. We review the...
Nov 11, 2020
Hamiltonian simulation meets holographic duality
"Analogue" Hamiltonian simulation involves engineering a Hamiltonian of interest in the laboratory and studying its properties experimentally. Large-scale Hamiltonian simulation experiments have been carried out in optical lattices, ion traps...
Nov 11, 2020
Disappearing stars without a trace: what is their maximum angular momentum?
We have tentative evidence of massive stars that disappear without a bright transient. It is commonly argued that this massive stars have low angular momentum and can collapse into a...
Nov 12, 2020
Origin of strong and/or quantized optical properties of topological semimetals
This talk starts by reviewing known examples of how topological materials generate new kinds of electrodynamic couplings and effects. Three-dimensional topological insulators realize a particular electromagnetic coupling known as “axion...
Nov 16, 2020
Testing Gravity with Gravitational Waves
Gravitational waves (GWs) have already proved immensely powerful for constraining cosmological extensions of GR, both from data-driven and theoretical perspectives. However, GWs really come into their own when used in...
Nov 17, 2020
Thermal Friction in Early Cosmology.
Rolling scalar fields play an important role in understanding cosmology within a particle physics framework. Coupling a rolling scalar field to light degrees of freedom gives rise to a thermal...
Nov 17, 2020