Zobrazeno 1 - 10
of 5 612
pro vyhledávání: '"Stein, A. L."'
Autor:
Newman, C. M., Stein, D. L.
Publikováno v:
Front. Phys. 12:1473378 (2024)
We show that the notion of critical droplets is central to an understanding of the nature of ground states in the Edwards-Anderson Ising model of a spin glass in arbitrary dimension. Given a specific ground state, suppose the coupling value for a giv
Externí odkaz:
http://arxiv.org/abs/2410.20610
Autor:
Newman, C. M., Stein, D. L.
Publikováno v:
J. Stat. Phys. 191, 128 (2024)
It is generally believed (but not yet proved) that Ising spin glasses with nearest-neighbor interactions have a phase transition in three and higher dimensions to a low-temperature spin glass phase, but the nature of this phase remains controversial,
Externí odkaz:
http://arxiv.org/abs/2407.17506
Autor:
Jandaghi, Emadodin, Stein, Dalton L., Hoburg, Adam, Stegagno, Paolo, Zhou, Mingxi, Yuan, Chengzhi
This paper addresses the problem of composite synchronization and learning control in a network of multi-agent robotic manipulator systems with heterogeneous nonlinear uncertainties under a leader-follower framework. A novel two-layer distributed ada
Externí odkaz:
http://arxiv.org/abs/2403.00987
Combining strengths from deep learning and extreme value theory can help describe complex relationships between variables where extreme events have significant impacts (e.g., environmental or financial applications). Neural networks learn complicated
Externí odkaz:
http://arxiv.org/abs/2310.03220
Autor:
Newman, C. M., Stein, D. L.
Publikováno v:
J. Phys. A: Math. Theor. 57, 11LT01(2024)
We investigate scenarios in which the low-temperature phase of short-range spin glasses comprises thermodynamic states which are nontrivial mixtures of multiple incongruent pure state pairs. We construct a new kind of metastate supported on Gibbs sta
Externí odkaz:
http://arxiv.org/abs/2306.07132
Current models for spatial extremes are concerned with the joint upper (or lower) tail of the distribution at two or more locations. Such models cannot account for teleconnection patterns of two-meter surface air temperature ($T_{2m}$) in North Ameri
Externí odkaz:
http://arxiv.org/abs/2208.12092
A common approach to approximating Gaussian log-likelihoods at scale exploits the fact that precision matrices can be well-approximated by sparse matrices in some circumstances. This strategy is motivated by the \emph{screening effect}, which refers
Externí odkaz:
http://arxiv.org/abs/2208.06877
Publikováno v:
Phys. Rev. Lett. 130, 077102 (2023)
We consider short-range Ising spin glasses in equilibrium at infinite system size, and prove that, for fixed bond realization and a given Gibbs state drawn from a suitable metastate, each translation- and locally-invariant function (for example, self
Externí odkaz:
http://arxiv.org/abs/2207.10208
We review work by the authors on thermal activation in nanoscopic magnetic systems. These systems present unique difficulties in analyzing noise-induced escape over a barrier, including the presence of nonlocal interactions, nongradient terms in the
Externí odkaz:
http://arxiv.org/abs/2206.05826
Nonstationary Gaussian process models can capture complex spatially varying dependence structures in spatial datasets. However, the large number of observations in modern datasets makes fitting such models computationally intractable with conventiona
Externí odkaz:
http://arxiv.org/abs/2206.05220