Results 81 to 90 of about 91,861 (215)

The outliers of a deformed Wigner matrix

, 2014
We derive the joint asymptotic distribution of the outlier eigenvalues of an additively deformed Wigner matrix $H$. Our only assumptions on the deformation are that its rank be fixed and its norm bounded.
Knowles, Antti, Yin, Jun
core   +1 more source

Classification of Broadband Oscillations Using Wavelet Convolution and Multi‐Channel Attention Network

Energy Internet, EarlyView.
ABSTRACT Accurate identification of broadband oscillation types is a prerequisite for implementing appropriate control strategies. The strongly nonlinear, nonstationary and multi‐modal characteristics of broadband oscillation signals impose higher demands on identification methods. Practical applications face challenges such as coupling effects between
Jinduo Yang, Ji Li, Yiyan Li, Yang Gao, Qingyuan Zhang, Yang Kou, Xiao Hu, WeiLe Liang   +7 more
wiley   +1 more source

Fuzzy spaces and new random matrix ensembles

, 2012
We analyze the expectation value of observables in a scalar theory on the fuzzy two sphere, represented as a generalized hermitian matrix model. We calculate explicitly the form of the expectation values in the large-N limit and demonstrate that, for any
A. P. Polychronakos, D. Voiculescu, D. Voiculescu, I. R. Klebanov, J. Tekel, V. P. Nair   +5 more
core   +1 more source

Wave Tracing: Generalizing The Path Integral To Wave Optics

Computer Graphics Forum, EarlyView.
Abstract Modeling the wave nature of light and the propagation and diffraction of electromagnetic fields is crucial for the accurate simulation of many phenomena, yet wave simulations are significantly more computationally complex than classical ray‐based models.
Shlomi Steinberg, Matt Pharr
wiley   +1 more source

The Wigner Distribution

, 2010
In contrast to classical physics, the language of quantum mechanics involves operators and wave functions (or, more generally, density operators). However, in 1932, Wigner formulated quantum mechanics in terms of a distribution function $W(q,p)$, the marginals of which yield the correct quantum probabilities for $q$ and $p$ separately \cite{wigner ...
openaire   +2 more sources

Modelling the time‐resolved modulations of cardiac activity in rats: A study on pharmacological autonomic stimulation

The Journal of Physiology, EarlyView.
Abstract figure legend Time‐resolved estimation of cardiac rhythmicity parameters. A pipeline is shown for the estimation of the fluctuating cardiac parameters, based on the Poincaré plot. The Poincaré plot illustrates the successive changes in interbeat intervals (IBI).
Diego Candia‐Rivera, Sofia Carrion‐Falgarona, Fabrizio de Vico Fallani, Mario Chavez   +3 more
wiley   +1 more source

Wigner Molecules in Nanostructures

, 1993
The one-- and two-- particle densities of up to four interacting electrons with spin, confined within a quasi one--dimensional ``quantum dot'' are calculated by numerical diagonalization.
Averin D V, B Kramer, Isihara A, K Jauregui, Kouwenhoven L P, Mahan G D, Mattis D C, Pfaff W, W Häusler   +8 more
core   +1 more source

Zeros of the Wigner Distribution and the Short-Time Fourier Transform

, 2018
We study the question under which conditions the zero set of a (cross-) Wigner distribution W (f, g) or a short-time Fourier transform is empty. This is the case when both f and g are generalized Gaussians, but we will construct less obvious examples ...
Gröchenig, Karlheinz, Jaming, Philippe, Malinnikova, Eugenia   +2 more
core  

Moments of the Wigner Distribution and a Generalized Uncertainty Principle [PDF]

, 1997
The nonnegativity of the density operator of a state is faithfully coded in its Wigner distribution, and this places constraints on the moments of the Wigner distribution.
Mukunda, N., Simon, R.
core   +1 more source

Reducing nonideal to ideal coupling in random matrix description of chaotic scattering: Application to the time-delay problem

, 2001
We write explicitly a transformation of the scattering phases reducing the problem of quantum chaotic scattering for systems with M statistically equivalent channels at nonideal coupling to that for ideal coupling.
B. Dietz, C. Itzykson, C.A. Engelbrecht, C.W.J. Beenakker, Dmitry V. Savin, E.P. Wigner, F.T. Smith, Hans-Jürgen Sommers, J.J.M. Verbaarschot, K.B. Efetov, L.K. Hua, M. Glück, N. Lehmann, N. Lehmann, P.A. Mello, P.W. Brouwer, P.W. Brouwer, P.W. Brouwer, T. Guhr, V.A. Gopar, V.A. Gopar, V.L. Lyuboshitz, V.L. Lyuboshitz, V.L. Lyuboshitz, V.V. Sokolov, V.V. Sokolov, W.A. Friedman, Y.V. Fyodorov, Y.V. Fyodorov, Y.V. Fyodorov, Yan V. Fyodorov   +30 more
core   +1 more source