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Measurement of quantum fields in curved spacetimes
A standard account of the measurement chain in quantum mechanics involves a probe (itself a quantum system) coupled temporarily to the system of interest. Once the coupling is removed, the...
Oct 28, 2020
Nilpotent Slodowy slices and W-algebras
To any vertex algebra one can attach in a canonical way a certain Poisson variety, called the associated variety. Nilpotent Slodowy slices appear as associated varieties of admissible (simple) W-algebras...
Oct 29, 2020
Moving Closer to a Detection of nHz-frequency Gravitational Waves with NANOGrav
Millisecond Pulsars (MSPs) have become reliable and extremely stable workhorses of modern astronomy and physics. The North American Nanohertz Observatory for Gravitational Waves, or NANOGrav, has been observing growing numbers...
Oct 29, 2020
Borcherds algebras and 2d string theory
Borcherds Kac-Moody (BKM) algebras are a generalization of familiar Kac-Moody algebras with imaginary simple roots. On the one hand, they were invented by Borcherds in his proof of the monstrous...
Oct 29, 2020
A note on dual gravitational charges
Dual gravitational charges (DGCs) have been originally computed in the first-order formalism by means of covariant phase space methods using tetrad variables. I show i) why DGCs do not arise...
Oct 29, 2020
Contextuality-by-default for behaviours in compatibility scenarios
The compatibility-hypergraph approach to contextuality (CA) and the contextuality-by-default approach (CbD) are usually presented as products of entirely different views on how physical measurements and measurement contexts should be understood...
Oct 30, 2020
New physics in flat Moire bands
Flat bands in Moire superlattices are emerging as a fascinating new playground for correlated electron physics. I will present the results of several studies inspired by these developments. First, I...
Nov 02, 2020
The Connected Universe: Relating Early, Intermediate and Late Universe with cosmological data
The standard model of cosmology is built upon on a series of propositions on how the early, intermediate, and late epochs of the Universe behave. In particular, it predicts that...
Nov 03, 2020
Gravitational Laboratories for Nuclear Physics (in light of GWTC-2)
Gravitational waves provide a unique way to study the universe. From the initial direct detection of coalescing black holes in 2015, to the ground-breaking multimessenger observations of coalescing neutron stars...
Nov 04, 2020