Results 1 to 10 of about 57,915 (295)
Ott-Antonsen ansatz truncation of a circular cumulant series [PDF]
Physical Review Research, 2019 The cumulant representation is common in classical statistical physics for variables on the real line and the issue of closures of cumulant expansions is well elaborated. The case of phase variables significantly differs from the case of linear ones; the
Denis S. Goldobin +1 more
doaj +2 more sources
Determining the validity of cumulant expansions for central spin models [PDF]
Physical Review Research, 2023 For a model with many-to-one connectivity it is widely expected that mean-field theory captures the exact many-particle N→∞ limit, and that higher-order cumulant expansions of the Heisenberg equations converge to this same limit whilst providing improved
Piper Fowler-Wright +4 more
doaj +2 more sources
Journal of Chemical Physics, 2020 First-principles modeling of nonlinear optical spectra in the condensed phase is highly challenging because both environment and vibronic interactions can play a large role in determining spectral shapes and excited state dynamics.
Tim J. Zuehlsdorff +3 more
openalex +2 more sources
IEEE Transactions on Neural Networks and Learning Systems, 2023 In this paper, we propose a novel loss function for training Generative Adversarial Networks (GANs) aiming towards deeper theoretical understanding as well as improved stability and performance for the underlying optimization problem. The new loss function is based on cumulant generating functions giving rise to \emph{Cumulant GAN}.
Yannis Pantazis +4 more
openaire +4 more sources
Characterizing superradiant dynamics in atomic arrays via a cumulant expansion approach [PDF]
Physical Review Research, 2022 Ordered atomic arrays with subwavelength lattice spacing emit light collectively. For fully inverted atomic arrays, this results in an initial burst of radiation and a fast build up of coherences between the atoms at initial times.
Oriol Rubies-Bigorda +2 more
semanticscholar +1 more source
<i>GW</i> Plus Cumulant Approach for Predicting Core-Level Shakeup Satellites in Large Molecules. [PDF]
J Chem Theory ComputKockläuner J, Golze D.
europepmc +3 more sources
Real-Time Coupled-Cluster Approach for the Cumulant Green's Function. [PDF]
Journal of Chemical Theory and Computation, 2020 Green's function methods within many-body perturbation theory provide a general framework for treating electronic correlations in excited states and spectra.
F. Vila +4 more
semanticscholar +1 more source
Cumulant–Cumulant Relations in Free Probability Theory from Magnus’ Expansion [PDF]
Foundations of Computational Mathematics, 2020 Relations between moments and cumulants play a central role in both classical and non-commutative probability theory. The latter allows for several distinct families of cumulants corresponding to different types of independences: free, Boolean and ...
Adrian Celestino +3 more
semanticscholar +1 more source
Equation-of-Motion Coupled-Cluster Cumulant Green’s Function for Excited States and X-Ray Spectra
Frontiers in Chemistry, 2021 Green’s function methods provide a robust, general framework within many-body theory for treating electron correlation in both excited states and x-ray spectra.
F. D. Vila +4 more
doaj +1 more source
Equation of motion coupled-cluster cumulant approach for intrinsic losses in x-ray spectra.
Journal of Chemical Physics, 2020 We present a combined equation of motion coupled-cluster cumulant Green's function approach for calculating and understanding intrinsic inelastic losses in core level x-ray absorption spectra (XAS) and x-ray photoemission spectra.
J. Rehr +5 more
semanticscholar +1 more source