2025 – Page 72 – Kavli Institute Pre-Print Publications

The role of effective mass and long-range interactions in the band-gap renormalization of photo-excited semiconductors

Posted by dbos March 12, 2025Caltech

Kavli Affiliate: Scott K. Cushing | First 5 Authors: Cian C. Reeves, Scott K. Cushing, Vojtech Vlcek, , | Summary: Understanding how to control changes in electronic structure and related dynamical renormalizations by external driving fields is the key for understanding ultrafast spectroscopy and applications in electronics. Here we focus on the band-gap’s modulation by […]

Continue..

The role of effective mass and long-range interactions in the band-gap renormalization of photo-excited semiconductors

Posted by dbos March 12, 2025March 26, 2025Caltech

Continue..

Hints of Primordial Magnetic Fields at Recombination and Implications for the Hubble Tension

Posted by dbos March 12, 2025March 31, 2025Stanford

Kavli Affiliate: Tom Abel | First 5 Authors: Karsten Jedamzik, Levon Pogosian, Tom Abel, , | Summary: Primordial Magnetic Fields (PMFs), long studied as potential relics of the early Universe, accelerate the recombination process and have been proposed as a possible way to relieve the Hubble tension. However, previous studies relied on simplified toy models. […]

Continue..

Optimal sensing on an asymmetric exceptional surface

Posted by dbos March 12, 2025Berkeley

Kavli Affiliate: Birgitta Whaley | First 5 Authors: Robert L. Cook, Liwen Ko, K. Birgitta Whaley, , | Summary: We study the connection between exceptional points (EPs) and optimal parameter estimation, in a simple system consisting of two counter-propagating traveling wave modes in a microring resonator. The unknown parameter to be estimated is the strength […]

Continue..

Optimal sensing on an asymmetric exceptional surface

Posted by dbos March 12, 2025Berkeley

Continue..

Frequency-resolved time lags due to X-ray disk reprocessing in AGN

Posted by dbos March 12, 2025MIT

Kavli Affiliate: Erin Kara | First 5 Authors: Christos Panagiotou, Iossif Papadakis, Erin Kara, Marios Papoutsis, Edward M. Cackett | Summary: Over the last years, a number of broadband reverberation mapping campaigns have been conducted to explore the short-term UV and optical variability of nearby AGN. Despite the extensive data collected, the origin of the […]

Continue..

Long-lived Light Mediators in a Higgs Portal Model at the FCC-ee

Posted by dbos March 11, 2025Tokyo

Kavli Affiliate: Shigeki Matsumoto | First 5 Authors: Biplob Bhattacherjee, Camellia Bose, Herbi K. Dreiner, Nivedita Ghosh, Shigeki Matsumoto | Summary: In the search for beyond the Standard Model (SM) physics, long-lived particles (LLPs) have emerged as potential candidates and are being explored in various ongoing experiments. Future lepton colliders, such as the FCC-ee, shall […]

Continue..

Exact Results in Chiral Gauge Theories with Flavor

Posted by dbos March 11, 2025Tokyo

Kavli Affiliate: Hitoshi Murayama | First 5 Authors: Jacob M. Leedom, Hitoshi Murayama, Gup Singh, Bethany Suter, Jason Wong | Summary: We present exact results in softly-broken supersymmetric $text{SU}(N_C)$ chiral gauge theories with charged fermions in one antisymmetric, $N_F$ fundamental, and $N_C+N_F-4$ anti-fundamental representations. We achieve this by considering the supersymmetric version of these theories […]

Continue..

Exact Results in Chiral Gauge Theories with Flavor

Posted by dbos March 11, 2025Tokyo

Kavli Affiliate: Hitoshi Murayama | First 5 Authors: Jacob M. Leedom, Hitoshi Murayama, Gup Singh, Bethany Suter, Jason Wong | Summary: We present exact results in $text{SU}(N_C)$ chiral gauge theories with charged fermions in an antisymmetric, $N_F$ fundamental, and $N_C + N_F – 4$ anti-fundamental representations. We achieve this by considering the supersymmetric version of […]

Continue..

JWST’s First View of Tidal Disruption Events: Compact, Accretion-Driven Emission Lines & Strong Silicate Emission in an Infrared-selected Sample

Posted by klaurent March 11, 2025MIT

Kavli Affiliate: Erin Kara | First 5 Authors: Megan Masterson, Kishalay De, Christos Panagiotou, Erin Kara, Anna-Christina Eilers | Summary: Mid-infrared (MIR) emission from tidal disruption events (TDEs) is a powerful probe of the circumnuclear environment around dormant supermassive black holes. This emission arises from the reprocessing of intrinsic emission into thermal MIR emission by […]

Continue..