Kavli Affiliate: Austin Joyce | First 5 Authors: Austin Joyce, Alberto Nicolis, Alessandro Podo, Luca Santoni, | Summary: We revisit certain subtleties of renormalization that arise when one derives a low-energy effective action by integrating out the heavy fields of a more complete theory. Usually these subtleties are circumvented by matching some physical observables, such […]
Kavli Affiliate: Salvatore Vitale | First 5 Authors: Yiwen Huang, Hsin-Yu Chen, Carl-Johan Haster, Ling Sun, Salvatore Vitale | Summary: Gravitational-wave (GW) detections of electromagnetically bright compact binary coalescences can provide an independent measurement of the Hubble constant $H_0$. In order to obtain a measurement that could help arbitrating the existing tension on $H_0$, one […]
Kavli Affiliate: Salvatore Vitale | First 5 Authors: Yiwen Huang, Hsin-Yu Chen, Carl-Johan Haster, Ling Sun, Salvatore Vitale | Summary: Gravitational-wave (GW) detections of electromagnetically bright compact binary coalescences can provide an independent measurement of the Hubble constant $H_0$. In order to obtain a measurement that could help arbitrate the existing tension on $H_0$, one […]
Kavli Affiliate: Lijing Shao | First 5 Authors: Zihang Wang, Lijing Shao, , , | Summary: The cosmological constant is not necessarily small in the early universe. If a scalar field obtains a vacuum expectation value after a phase transition (PT), a possibly large cosmological constant could present before PT. The early cosmological constant (ECC) […]
Kavli Affiliate: Subo Dong | First 5 Authors: Andrew Gould, Youn Kil Jung, Kyu-Ha Hwang, Subo Dong, Michael D. Albrow | Summary: We complete the survey for finite-source/point-lens (FSPL) giant-source events in 2016-2019 KMTNet microlensing data. The 30 FSPL events show a clear gap in Einstein radius, $9,mu{rm as}<theta_{rm E} <26,mu{rm as}$, which is consistent […]
Kavli Affiliate: Tom Melia | First 5 Authors: Anne-Katherine Burns, David E. Kaplan, Tom Melia, Surjeet Rajendran, | Summary: The quantum description of time evolution in non-linear gravitational systems such as cosmological space-times is not well understood. We show, in the simplified setting of mini-superspace, that time evolution of this system can be obtained using […]
Kavli Affiliate: Tom Melia | First 5 Authors: Anne-Katherine Burns, David E. Kaplan, Tom Melia, Surjeet Rajendran, | Summary: The quantum description of time evolution in non-linear gravitational systems such as cosmological space-times is not well understood. We show, in the simplified setting of mini-superspace, that time evolution of this system can be obtained using […]
Kavli Affiliate: Max Tegmark | First 5 Authors: Andrew K. Tan, Max Tegmark, Isaac L. Chuang, , | Summary: At the heart of both lossy compression and clustering is a trade-off between the fidelity and size of the learned representation. Our goal is to map out and study the Pareto frontier that quantifies this trade-off. […]
Kavli Affiliate: Martin Haehnelt | First 5 Authors: Moupiya Maji, Anne Verhamme, Joakim Rosdahl, Thibault Garel, Jeremy Blaizot | Summary: The primary difficulty in understanding the sources and processes that powered cosmic reionization is that it is not possible to directly probe the ionizing Lyman Continuum (LyC) radiation at that epoch as those photons have […]
Kavli Affiliate: Katrin Heitmann | First 5 Authors: Jonathan A. Blazek, Doug Clowe, Thomas E. Collett, Ian P. Dell’Antonio, Mark Dickinson | Summary: A new generation of powerful dark energy experiments will open new vistas for cosmology in the next decade. However, these projects cannot reach their utmost potential without data from other telescopes. This […]