Zobrazeno 1 - 10
of 32 612
pro vyhledávání: '"P. O'Donnell"'
We give a dimension-independent sparsification result for suprema of centered Gaussian processes: Let $T$ be any (possibly infinite) bounded set of vectors in $\mathbb{R}^n$, and let $\{{\boldsymbol{X}}_t\}_{t\in T}$ be the canonical Gaussian process
Externí odkaz:
http://arxiv.org/abs/2411.14664
We construct the first explicit two-sided vertex expanders that bypass the spectral barrier. Previously, the strongest known explicit vertex expanders were given by $d$-regular Ramanujan graphs, whose spectral properties imply that every small subset
Externí odkaz:
http://arxiv.org/abs/2411.11627
Autor:
O'Donnell, Ryan, Singer, Noah G.
Recent major results in property testing~\cite{BLM24,DDL24} and PCPs~\cite{BMV24} were unlocked by moving to high-dimensional expanders (HDXs) constructed from $\widetilde{C}_d$-type buildings, rather than the long-known $\widetilde{A}_d$-type ones.
Externí odkaz:
http://arxiv.org/abs/2411.05916
We study quantum algorithms for verifying properties of the output probability distribution of a classical or quantum circuit, given access to the source code that generates the distribution. We consider the basic task of uniformity testing, which is
Externí odkaz:
http://arxiv.org/abs/2411.04972
Autor:
Bakshi, Ainesh, Bostanci, John, Kretschmer, William, Landau, Zeph, Li, Jerry, Liu, Allen, O'Donnell, Ryan, Tang, Ewin
We study the problem of finding a product state with optimal fidelity to an unknown $n$-qubit quantum state $\rho$, given copies of $\rho$. This is a basic instance of a fundamental question in quantum learning: is it possible to efficiently learn a
Externí odkaz:
http://arxiv.org/abs/2411.04283
Autor:
Wang, Jin, Guo, Bocheng, Li, Yijie, Wang, Junyi, Chen, Yuqian, Rushmore, Jarrett, Makris, Nikos, Rathi, Yogesh, O'Donnell, Lauren J, Zhang, Fan
Tractography fiber clustering using diffusion MRI (dMRI) is a crucial strategy for white matter (WM) parcellation. Current methods primarily use the geometric information of fibers (i.e., the spatial trajectories) to group similar fibers into cluster
Externí odkaz:
http://arxiv.org/abs/2411.01859
Autor:
O'Donnell, Kayla E., Slatyer, Tracy R.
A number of new balloon or space-based gamma-ray observatories have been proposed to close a "MeV gap" in sensitivity to gamma rays in the MeV-GeV energy band. One aspect of the science case for these instruments is their ability to constrain or disc
Externí odkaz:
http://arxiv.org/abs/2411.00087
Autor:
Lo, Yui, Chen, Yuqian, Liu, Dongnan, Legarreta, Jon Haitz, Zekelman, Leo, Zhang, Fan, Rushmore, Jarrett, Rathi, Yogesh, Makris, Nikos, Golby, Alexandra J., Cai, Weidong, O'Donnell, Lauren J.
Brain imaging studies have demonstrated that diffusion MRI tractography geometric shape descriptors can inform the study of the brain's white matter pathways and their relationship to brain function. In this work, we investigate the possibility of ut
Externí odkaz:
http://arxiv.org/abs/2410.22099
Autor:
Cheng, Yik San, Zhao, Runkai, Wang, Heng, Peng, Hanchuan, Lo, Yui, Chen, Yuqian, O'Donnell, Lauren J., Cai, Weidong
Reconstructing neuron morphology from 3D light microscope imaging data is critical to aid neuroscientists in analyzing brain networks and neuroanatomy. With the boost from deep learning techniques, a variety of learning-based segmentation models have
Externí odkaz:
http://arxiv.org/abs/2410.22078
Autor:
Roberts, M. Grant, Braff, Lila, Garg, Aarna, Profumo, Stefano, Jeltema, Tesla, O'Donnell, Jackson
Evidence for high-redshift supermassive black holes challenges standard scenarios for how such objects form in the early universe. Here, we entertain the possibility that a fraction of the cosmological dark matter could be ultra-strongly self interac
Externí odkaz:
http://arxiv.org/abs/2410.17480