Caltech – Kavli Institute Pre-Print Publications

Content-Rich AIGC Video Quality Assessment via Intricate Text Alignment and Motion-Aware Consistency

Posted by February 6, 2025Caltech

Kavli Affiliate: Wei Gao | First 5 Authors: Shangkun Sun, Xiaoyu Liang, Bowen Qu, Wei Gao, | Summary: The advent of next-generation video generation models like textit{Sora} poses challenges for AI-generated content (AIGC) video quality assessment (VQA). These models substantially mitigate flickering artifacts prevalent in prior models, enable longer and complex text prompts and generate […]

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Universal machine learning interatomic potentials poised to supplant DFT in modeling general defects in metals and random alloys

Posted by February 5, 2025Caltech

Kavli Affiliate: Wei Gao | First 5 Authors: Fei Shuang, Zixiong Wei, Kai Liu, Wei Gao, Poulumi Dey | Summary: Recent advances in machine learning, combined with the generation of extensive density functional theory (DFT) datasets, have enabled the development of universal machine learning interatomic potentials (uMLIPs). These models offer broad applicability across the periodic […]

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Rethinking stance detection: A theoretically-informed research agenda for user-level inference using language models

Posted by dbos February 4, 2025February 5, 2025Caltech, This Week: Nanoscience

Kavli Affiliate: Wei Gao | First 5 Authors: Prasanta Bhattacharya, Hong Zhang, Yiming Cao, Wei Gao, Brandon Siyuan Loh | Summary: Stance detection has emerged as a popular task in natural language processing research, enabled largely by the abundance of target-specific social media data. While there has been considerable research on the development of stance […]

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Ultrafast All-Optical Measurement of Squeezed Vacuum in a Lithium Niobate Nanophotonic Circuit

Posted by dbos February 1, 2025February 5, 2025Caltech, This Week: Nanoscience

Kavli Affiliate: Alireza Marandi | First 5 Authors: James Williams, Elina Sendonaris, Rajveer Nehra, Robert M Gray, Ryoto Sekine | Summary: Squeezed vacuum, a fundamental resource for continuous-variable quantum information processing, has been used to demonstrate quantum advantages in sensing, communication, and computation. While most experiments use homodyne detection to characterize squeezing and are therefore […]

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Ultrafast All-Optical Measurement of Squeezed Vacuum in a Lithium Niobate Nanophotonic Circuit

Posted by February 1, 2025Caltech

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Assessing Sensitivity of Brain-to-Scalp Blood Flows in Laser Speckle Imaging by Occluding the Superficial Temporal Artery

Posted by dbos January 31, 2025February 5, 2025Caltech, This Week: Nanoscience

Kavli Affiliate: Changhuei Yang | First 5 Authors: Yu Xi Huang, Simon Mahler, Maya Dickson, Aidin Abedi, Yu Tung Lo | Summary: Cerebral blood flow is a critical metric for cerebrovascular monitoring, with applications in stroke detection, brain injury evaluation, aging, and neurological disorders. Non-invasively measuring cerebral blood dynamics is challenging due to the scalp […]

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Five-dimensional single-shot fluorescence imaging using a polarized Fourier light-field microscope

Posted by dbos January 29, 2025February 5, 2025Caltech, This Week: Nanoscience

Kavli Affiliate: Changhuei Yang | First 5 Authors: Oumeng Zhang, Changhuei Yang, , , | Summary: Single-shot fluorescence imaging techniques have gained increasing interest in recent years due to their ability to rapidly capture complex biological data without the need for extensive scanning. In this letter, we introduce polarized Fourier light field microscopy (pFLFM), a […]

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CIBER 4th flight fluctuation analysis: Measurements of near-IR auto- and cross-power spectra on arcminute to sub-degree scales

Posted by dbos January 29, 2025February 5, 2025Caltech, This Week: Nanoscience

Kavli Affiliate: James J. Bock | First 5 Authors: Richard M. Feder, James J. Bock, Yun-Ting Cheng, Asantha Cooray, Phillip M. Korngut | Summary: We present new anisotropy measurements in the near-infrared (NIR) for angular multipoles $300<ell<10^5$ using imaging data at 1.1 $mu$m and 1.8 $mu$m from the fourth flight of the Cosmic Infrared Background […]

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CIBER 4th flight fluctuation analysis: Pseudo-power spectrum formalism, improved source masking and validation on mocks

Posted by dbos January 29, 2025February 5, 2025Caltech, This Week: Nanoscience

Kavli Affiliate: James J. Bock | First 5 Authors: Richard M. Feder, James J. Bock, Yun-Ting Cheng, Asantha Cooray, Phillip M. Korngut | Summary: Precise, unbiased measurements of extragalactic background anisotropies require careful treatment of systematic effects in fluctuation-based, broad-band intensity mapping measurements. In this paper we detail improvements in methodology for the Cosmic Infrared […]

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Ultrafast neuromorphic computing with nanophotonic optical parametric oscillators

Posted by dbos January 28, 2025February 5, 2025Caltech, This Week: Nanoscience

Kavli Affiliate: Alireza Marandi | First 5 Authors: Midya Parto, Gordon H. Y. Li, Ryoto Sekine, Robert M. Gray, Luis L. Ledezma | Summary: Over the past decade, artificial intelligence (AI) has led to disruptive advancements in fundamental sciences and everyday technologies. Among various machine learning algorithms, deep neural networks have become instrumental in revealing […]

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