Zobrazeno 1 - 10
of 1 641
pro vyhledávání: '"Yuan, Ya"'
Low-rank tensors appear to be prosperous in many applications. However, the sets of bounded-rank tensors are non-smooth and non-convex algebraic varieties, rendering the low-rank optimization problems to be challenging. To this end, we delve into the
Externí odkaz:
http://arxiv.org/abs/2411.14093
Autor:
Yuan, Ya-xiang, Zhang, Yi
In recent years, accelerated extra-gradient methods have attracted much attention by researchers, for solving monotone inclusion problems. A limitation of most current accelerated extra-gradient methods lies in their direct utilization of the initial
Externí odkaz:
http://arxiv.org/abs/2406.10793
Bilevel reinforcement learning (RL), which features intertwined two-level problems, has attracted growing interest recently. The inherent non-convexity of the lower-level RL problem is, however, to be an impediment to developing bilevel optimization
Externí odkaz:
http://arxiv.org/abs/2405.19697
Bilevel optimization, with broad applications in machine learning, has an intricate hierarchical structure. Gradient-based methods have emerged as a common approach to large-scale bilevel problems. However, the computation of the hyper-gradient, whic
Externí odkaz:
http://arxiv.org/abs/2404.03331
Autor:
Chen, Bo, Liu, Hao, Wu, Qi-Yi, Zhang, Chen, Ye, Xue-Qing, Zhao, Yin-Zou, Song, Jiao-Jiao, Tian, Xin-Yi, Tan, Ba-Lei, Liu, Zheng-Tai, Ye, Mao, Chen, Zhen-Hua, Huang, Yao-Bo, Shen, Da-Wei, Yuan, Ya-Hua, He, Jun, Duan, Yu-Xia, Meng, Jian-Qiao
Publikováno v:
Phys. Rev. B 110, L041120 (2024)
In this study, we investigate the electronic structure of a spin-triplet superconductor candidate CeRh$_2$As$_2$ using high-resolution angle-resolved photoemission spectroscopy and density functional theory calculations. Notably, Fermi surface nestin
Externí odkaz:
http://arxiv.org/abs/2403.14057
Autor:
Liu, Hao, Wu, Qi-Yi, Zhang, Chen, Pang, Jie, Chen, Bo, Song, Jiao-Jiao, Duan, Yu-Xia, Yuan, Ya-Hua, Liu, Hai-Yun, Shu, Chuan-Cun, Xu, Yuan-Feng, Shi, You-Guo, Meng, Jian-Qiao
Publikováno v:
Phys. Rev. B 110, 195104(2024)
In this study, ultrafast optical spectroscopy was employed to elucidate the intricate topological features of EuIn$_2$As$_2$, a promising candidate for a magnetic topological-crystalline axion insulator. Our investigation, focusing on the real-time e
Externí odkaz:
http://arxiv.org/abs/2401.11386
Autor:
Song, Jiao-Jiao, Zhang, Chen, Wu, Qi-Yi, Zhao, Yin-Zou, Rusz, Jan, Joyce, John. J., Graham, Kevin. S., Riseborough, Peter, Olson, Clifford G., Liu, Hao, Chen, Bo, Yuan, Ya-Hua, Duan, Yu-Xia, Tobash, Paul H., Bauer, Eric D., Oppeneer, Peter M., Durakiewicz, Tomasz, Meng, Jian-Qiao
Publikováno v:
Phys. Rev. B 109, 205114 (2024)
We investigate the antiferromagnetic heavy fermion superconductor UPd$_2$Al$_3$, employing angle-resolved photoemission spectroscopy to unravel the complex electronic structure of its U 5f electrons. We observe unexpected characteristics that challen
Externí odkaz:
http://arxiv.org/abs/2401.03691
In the realm of tensor optimization, the low-rank Tucker decomposition is crucial for reducing the number of parameters and for saving storage. We explore the geometry of Tucker tensor varieties -- the set of tensors with bounded Tucker rank -- which
Externí odkaz:
http://arxiv.org/abs/2311.18324
Autor:
Zhao, in-Zou, Song, Jiao-Jiao, Wu, Qi-Yi, Liu, Hao, Zhang, Chen, Chen, Bo, Zhang, Hong-Yi, Chen, Zhen-Hua, Huang, Yao-Bo, Ye, Xuc-Qing, Yuan, Ya-Hua, Duan, Yu-Xia, He, Jun, Meng, Jian-Qiao
Synchrotron-based angle-resolved photoemission spectroscopy was employed to investigate the temperature evolution of the Yb 4f spectral for surface and bulk in the Kondo lattice YbCu$_2$Si$_2$.Our study quantitatively distinguishes between the surfac
Externí odkaz:
http://arxiv.org/abs/2310.10216
We consider the linear conic optimization problem with the cone of nonnegative polynomials. Its dual optimization problem is the generalized moment problem. Moment-SOS relaxations are powerful for solving them. This paper studies finite convergence o
Externí odkaz:
http://arxiv.org/abs/2309.15398