Results 51 to 60 of about 1,029,566 (295)

Ising field theory in a magnetic field: φ 3 coupling at T > Tc

Journal of High Energy Physics, 2023
We study the “three particle coupling” Γ 11 1 ξ $$ {\Gamma}_{11}^1\left(\xi \right) $$ , in 2d Ising Field Theory in a magnetic field, as the function of the scaling parameter ξ := h/(−m)15/8, where m ∼ T c − T and h ∼ H are scaled deviation from the ...
Hao-Lan Xu, Alexander Zamolodchikov
doaj   +1 more source

Statistical Properties of Cross-Correlation in the Korean Stock Market

, 2010
We investigate the statistical properties of the correlation matrix between individual stocks traded in the Korean stock market using the random matrix theory (RMT) and observe how these affect the portfolio weights in the Markowitz portfolio theory.
A. Utsugi, A.M. Sengupta, B. Rosenow, C. Eom, D. Sornette, E.P. Wigner, E.P. Wigner, F. Wang, F.J. Dyson, F.J. Dyson, G. Oh, G. Oh, H. E. Stanley, H.M. Markowitz, J.D. Noh, K. Yamasaki, L. Laloux, M.L. Mehta, M.L. Metha, M.L. Metha, P. Cizeau, P. Seba, R.N. Mantegna, R.N. Mantegna, S. Kim, S. Shari, T. Guhr, T. Guhr, T. Lux, T. Lux, V. Plerou, V. Plerou, V. Plerou, W.-S. Jung, W.C. Jun, X. Gabaix, Y. Liu, Y. Okhrin   +37 more
core   +2 more sources

Level density of $^{56}$Fe and low-energy enhancement of $\gamma$-strength function

, 2006
The $^{55}$Mn$(d,n)^{56}$Fe differential cross section is measured at $E_d=7$ MeV\@. The $^{56}$Fe level density obtained from neutron evaporation spectra is compared to the level density extracted from the $^{57}$Fe$(^3$He,$\alpha\gamma)^{56}$Fe ...
A. Schiller, A. V. Voinov, C. R. Brune, D. Pines, E. Algin, G. E. Mitchell, H. Vonach, J. Rekstad, M. Guttormsen, M. J. Hornish, S. G. Kadmenskii, S. G. Kadmenskii, S. M. Grimes, S. Siem, T. Belgya, T. Massey, T. N. Massey, U. Agvaanluvsan   +17 more
core   +1 more source

A Random Matrix Approach to Neural Networks [PDF]

arXiv.org, 2017
This article studies the Gram random matrix model $G=\frac1T\Sigma^{\rm T}\Sigma$, $\Sigma=\sigma(WX)$, classically found in the analysis of random feature maps and random neural networks, where $X=[x_1,\ldots,x_T]\in{\mathbb R}^{p\times T}$ is a (data ...
Cosme Louart, Zhenyu Liao, Romain Couillet   +2 more
semanticscholar   +1 more source

New Banach Sequence Spaces Defined by Jordan Totient Function

Communications in Advanced Mathematical Sciences, 2023
In this study, a special lower triangular matrix derived by combining Riesz matrix and Jordan totient matrix is used to construct new Banach spaces. $\alpha-$,$\beta-$,$\gamma-$duals of the resulting spaces are obtained and some matrix operators are ...
Uskan Devletli̇, Merve İlkhan Kara
semanticscholar   +1 more source

Exact Expressions for Kullback–Leibler Divergence for Multivariate and Matrix-Variate Distributions

Entropy
The Kullback–Leibler divergence is a measure of the divergence between two probability distributions, often used in statistics and information theory. However, exact expressions for it are not known for multivariate or matrix-variate distributions apart ...
Victor Nawa, Saralees Nadarajah
doaj   +1 more source

Robust Relative Error Estimation

Entropy, 2018
Relative error estimation has been recently used in regression analysis. A crucial issue of the existing relative error estimation procedures is that they are sensitive to outliers.
Kei Hirose, Hiroki Masuda
doaj   +1 more source

The Post-Decoherence Density Matrix Propagator for Quantum Brownian Motion

, 1996
Using the path integral representation of the density matrix propagator of quantum Brownian motion, we derive its asymptotic form for times greater than the localization time, $ (\hbar / \gamma k T )^{\half}$, where $\gamma$ is the dissipation and $T ...
A. Anderson, A. O. Caldeira, Andreas Zoupas, B. L. Hu, B. L. Hu, C. Anastopoulos, C. M. Caves, D. Gatarek, E. Joos, G. C. Ghirardi, G. C. Ghirardi, G. S. Agarwal, G. W. Ford, H. F. Dowker, H. Grabert, I. R. Senitzky, J. J. Halliwell, J. J. Halliwell, J. P. Paz, J. P. Paz, J. Schwinger, Jonathan Halliwell, K. Husimi, L. Diósi, L. Diósi, L. Diósi, L. Diósi, L. Schulman, M. B. Mensky, M. Gell-Mann, M. R. Gallis, N. Balazs, N. Gisin, N. Gisin, N. Gisin, R. Griffiths, R. Omnès, T. Brun, V. Hakim, V. I. Tatarskii, W. G. Unruh, W. Zurek, W. Zurek, W. Zurek, W. Zurek, W. Zurek, Y. Salama   +46 more
core   +1 more source

Electroweak axial structure functions and improved extraction of the Vud CKM matrix element [PDF]

Physical Review D, 2020
We present a comprehensive analysis of the $\gamma W$ interference radiative correction to the neutron $\beta$-decay matrix element. Within a dispersion relations approach, we compute the axial-vector part of the $\gamma W$ box amplitude $\Box^{\gamma W ...
K. Shiells, P. Blunden, W. Melnitchouk
semanticscholar   +1 more source

Towards a global fit to extract the B->Xs gamma decay rate and Vub

, 2010
The total B->Xs gamma decay rate and the CKM-matrix element Vub play an important role in finding indirect evidence for new physics affecting the flavor sector of the Standard Model, complementary to direct searches at the LHC and Tevatron.
Bernlochner, Florian U., Lacker, Heiko, Ligeti, Zoltan, Stewart, Iain W., Tackmann, Frank J., Tackmann, Kerstin   +5 more
core   +1 more source