Results 1 to 10 of about 1,913,231 (211)

Detecting Phase Transitions from Data Using Generative Learning [PDF]

Entropy
Identifying phase transitions in complex many-body systems traditionally necessitates the definition of specific order parameters, a task often requiring prior knowledge of the statistical model and the symmetry-breaking mechanism.
Xiyu Zhou, Yan Mi, Pan Zhang
doaj   +2 more sources

Sub-Lorentzian Geometry of Curves and Surfaces in a Lorentzian Lie Group

Advances in Mathematical Physics, 2022
We consider the sub-Lorentzian geometry of curves and surfaces in the Lie group E1,1. Firstly, as an application of Riemannian approximants scheme, we give the definition of Lorentzian approximants scheme for E1,1 which is a sequence of Lorentzian ...
Haiming Liu, Jianyun Guan
doaj   +1 more source

Intrinsic spin Nernst effect of magnons in a noncollinear antiferromagnet

Physical Review Research, 2020
We investigate the intrinsic magnon spin current in a noncollinear antiferromagnetic insulator. We introduce a definition of the magnon spin current in a noncollinear antiferromagnet and find that it is in general nonconserved, but for certain symmetries
Bo Li, Shane Sandhoefner, Alexey A. Kovalev   +2 more
doaj   +1 more source

Mass-Energy-Momentum: Only there because of Spacetime? [PDF]

, 2010
I describe how relativistic field theory generalises the paradigm property of material systems, the possession of mass, to the requirement that they have a mass-energy-momentum density tensor associated with them.
Lehmkuhl, D, Dennis Lehmkuhl, Lehmkuhl, Dennis   +2 more
core   +1 more source

The intrinsic B-mode polarisation of the cosmic microwave background [PDF]

, 2014
. We estimate the B-polarisation induced in the Cosmic Microwave Background by the non-linear evolution of density perturbations. Using the second-order Boltzmann code SONG, our analysis incorporates, for the first time, all physical effects at ...
Guido Pettinari (16190237), Kazuya Koyama (4440604), Crittenden, Robert, Guido W. Pettinari, Kazuya Koyama, Robert Crittenden (16074614), David Wands (16067711), Christian Fidler (16190240), Martin Beneke, Beneke, Martin, Koyama, Kazuya, Pettinari, Guido W., Fidler, Christian, David W, Wands, David, Martin Beneke (16190243), Christian Fidler   +16 more
core   +1 more source

Varying Coefficient Tensor Models for Brain Imaging [PDF]

, 2005
We revisit a multidimensional varying-coefficient model (VCM), by allowing regressor coefficients to vary smoothly in more than one dimension, thereby extending the VCM of Hastie and Tibshirani.
Marx, Brian D., Eilers, Paul H. C., Heim, Susanne   +2 more
core   +1 more source

Finsler geometry on higher order tensor fields and applications to high angular resolution diffusion imaging. [PDF]

, 2009
We study 3D-multidirectional images, using Finsler geometry. The application considered here is in medical image analysis, specifically in High Angular Resolution Diffusion Imaging (HARDI) (Tuch et al. in Magn. Reson. Med.
Florack, L.M.J., Luc Florack, Florack, Luc, Florack, LMJ Luc, Astola, Laura, Florack, L., Astola, LJ Laura, Laura Astola, Astola, L.J., Astola, L.   +9 more
core   +2 more sources

Acute Respiratory Distress Syndrome:The Berlin Definition [PDF]

, 2012
The acute respiratory distress syndrome (ARDS) was defined in 1994 by the American-European Consensus Conference (AECC); since then, issues regarding the reliability and validity of this definition have emerged.
L Camporota, VM Ranieri, E Fan, BT Thompson, The ARDS Definition Task Force, E Caldwell, E. Caldwell, RANIERI, VITO MARCO, E. Fan, ND Ferguson, L. Camporota, GD Rubenfeld   +11 more
core   +1 more source

Tensor-Hypercontracted MP2 First Derivatives: Runtime and Memory Efficient Computation of Hyperfine Coupling Constants

, 2022
We employ our recently introduced tensor-hypercontracted (THC) second-order Møller–Plesset perturbation theory (MP2) method [Bangerter, F. H., Glasbrenner, M., Ochsenfeld, C. J. Chem. Theory Comput.
Christian Ochsenfeld (1467532), Michael Glasbrenner (9537493), Felix H. Bangerter (9926074)   +2 more
core   +2 more sources

Spline- and tensor-based signal reconstruction : from structure analysis to high-performance algorithms to multiplatform implementations and medical applications [PDF]

, 2015
The problem of signal reconstruction is of fundamental practical value for many applications associated with the field of signal and image processing.
Morozov, Oleksii
core   +1 more source