dbos – Page 8 – 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, 2025March 26, 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 […]

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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. […]

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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 […]

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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 […]

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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 […]

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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 […]

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The effect of boron incorporation on leakage and wake-up in ferroelectric Al_{1-x}Sc_xN

Posted by dbos March 11, 2025March 19, 2025Cornell

Kavli Affiliate: Debdeep Jena | First 5 Authors: Maike Gremmel, Chandrashekhar Prakash Savant, Debaditya Bhattacharya, Georg Schönweger, Debdeep Jena | Summary: This study explores the influence of boron incorporation on the structural and electrical properties of ferroelectric Aluminum Scandium Nitride (Al_{1-x}Sc_xN ) thin films, focusing on leakage currents, wake-up effects, and imprint behavior. Al_{1-x}Sc_xN films […]

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U-StyDiT: Ultra-high Quality Artistic Style Transfer Using Diffusion Transformers

Posted by dbos March 11, 2025March 19, 2025Peking

Kavli Affiliate: Jing Wang | First 5 Authors: Zhanjie Zhang, Ao Ma, Ke Cao, Jing Wang, Shanyuan Liu | Summary: Ultra-high quality artistic style transfer refers to repainting an ultra-high quality content image using the style information learned from the style image. Existing artistic style transfer methods can be categorized into style reconstruction-based and content-style […]

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WISA: World Simulator Assistant for Physics-Aware Text-to-Video Generation

Posted by dbos March 11, 2025March 19, 2025Peking

Kavli Affiliate: Jing Wang | First 5 Authors: Jing Wang, Ao Ma, Ke Cao, Jun Zheng, Zhanjie Zhang | Summary: Recent rapid advancements in text-to-video (T2V) generation, such as SoRA and Kling, have shown great potential for building world simulators. However, current T2V models struggle to grasp abstract physical principles and generate videos that adhere […]

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The Spectroscopic Stage-5 Experiment

Posted by dbos March 10, 2025March 19, 2025Chicago

Kavli Affiliate: Joshua Frieman | First 5 Authors: Robert Besuner, Arjun Dey, Alex Drlica-Wagner, Haruki Ebina, Guillermo Fernandez Moroni | Summary: Observational cosmology has provided an extraordinary perspective on our universe and our place within it. However, as our understanding of the universe has increased, some glaring holes in our knowledge have become apparent: What […]

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