Results 51 to 60 of about 139,450 (186)

Independent Process Analysis without A Priori Dimensional Information [PDF]

, 2007
Recently, several algorithms have been proposed for independent subspace analysis where hidden variables are i.i.d. processes. We show that these methods can be extended to certain AR, MA, ARMA and ARIMA tasks. Central to our paper is that we introduce a
Kiszlinger, Melinda, Lorincz, Andras, Poczos, Barnabas, Szabo, Zoltan   +3 more
core   +2 more sources

Learning Functions Varying along a Central Subspace

SIAM Journal on Mathematics of Data Science
Many functions of interest are in a high-dimensional space but exhibit low-dimensional structures. This paper studies regression of a $s$-H lder function $f$ in $\mathbb{R}^D$ which varies along a central subspace of dimension $d$ while $d\ll D$. A direct approximation of $f$ in $\mathbb{R}^D$ with an $\varepsilon$ accuracy requires the number of ...
Hao Liu, Wenjing Liao
openaire   +3 more sources

Relating correlation measures: the importance of the energy gap

, 2017
The concept of correlation is central to all approaches that attempt the description of many-body effects in electronic systems. Multipartite correlation is a quantum information theoretical property that is attributed to quantum states independent of ...
Benavides-Riveros, Carlos L., Lathiotakis, Nektarios N., Marques, Miguel A. L., Schilling, Christian   +3 more
core   +1 more source

Computation of Molecular Spectra on a Quantum Processor with an Error-Resilient Algorithm

Physical Review X, 2018
Harnessing the full power of nascent quantum processors requires the efficient management of a limited number of quantum bits with finite coherent lifetimes.
J. I. Colless, V. V. Ramasesh, D. Dahlen, M. S. Blok, M. E. Kimchi-Schwartz, J. R. McClean, J. Carter, W. A. de Jong, I. Siddiqi   +8 more
doaj   +1 more source

Entanglement of Spin-Pair Qubits with Intrinsic Dephasing Times Exceeding a Minute

Physical Review X, 2022
Understanding and protecting the coherence of individual quantum systems is a central challenge in quantum science and technology. Over the past decades, a rich variety of methods to extend coherence have been developed.
H. P. Bartling, M. H. Abobeih, B. Pingault, M. J. Degen, S. J. H. Loenen, C. E. Bradley, J. Randall, M. Markham, D. J. Twitchen, T. H. Taminiau   +9 more
doaj   +1 more source

Information Theoretical Estimators Toolbox [PDF]

, 2014
We present ITE (information theoretical estimators) a free and open source, multi-platform, Matlab/Octave toolbox that is capable of estimating many different variants of entropy, mutual information, divergence, association measures, cross quantities ...
Szabo, Zoltan
core   +1 more source

Closed string tachyon condensation revisited

Journal of High Energy Physics
We consider condensation of nearly marginal matter tachyons in closed string field theory and observe that upon restricting to a subspace of states not containing the ghost dilaton, the on-shell value of the action is proportional to the shift of the ...
Jaroslav Scheinpflug, Martin Schnabl
doaj   +1 more source

Shrinking of operators in quantum error correction and AdS/CFT

Journal of High Energy Physics, 2019
We first show that a class of operators acting on a given bipartite pure state on ℋ A ⊗ ℋ B can shrink its supports on ℋ A ⊗ ℋ B to only ℋ A or ℋ B while keeping its mappings. Using this result, we show how to systematically construct the decoders of the
Hayato Hirai
doaj   +1 more source

A conformal collider for holographic CFTs

Journal of High Energy Physics, 2018
We develop a formalism to study the implications of causality on OPE coefficients in conformal field theories with large central charge and a sparse spectrum of higher spin operators.
Nima Afkhami-Jeddi, Sandipan Kundu, Amirhossein Tajdini   +2 more
doaj   +1 more source

Chebyshev polynomial filtered subspace iteration in the Discontinuous Galerkin method for large-scale electronic structure calculations

, 2016
The Discontinuous Galerkin (DG) electronic structure method employs an adaptive local basis (ALB) set to solve the Kohn-Sham equations of density functional theory (DFT) in a discontinuous Galerkin framework.
Amartya S. Banerjee, Blackford L. S., Chao Yang, Gu M., John E. Pask, Kohanoff J., Lin Lin, Martin R. M., Saad Y., Wei Hu   +9 more
core   +1 more source