Results 41 to 50 of about 1,145,296 (299)
Dirac operator spectral density and low energy sum rules
, 2000 The spectral density of euclidean Dirac operator is investigated in partially quenched QCD with arbitrary quark masses. A representation of scalar and pseudoscalar correlators in terms of the spectral density is discussed.
Zyablyuk, K.
core +1 more source
One-particle spectral densities and phase diagrams of one-dimensional proton conductors
Condensed Matter Physics, 2021 The equilibrium states of one-dimensional proton conductors in the systems with hydrogen bonds are investigated. Our extended hard-core boson lattice model includes short-range interactions between hydrogen ions, their transfer along the hydrogen bonds ...
R. Ya. Stetsiv
doaj +1 more source
Spectral density of the non-backtracking operator
, 2014 The non-backtracking operator was recently shown to provide a significant improvement when used for spectral clustering of sparse networks. In this paper we analyze its spectral density on large random sparse graphs using a mapping to the correlation ...
Krzakala, Florent +2 more
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Constant and switched bias low frequency noise in p-MOSFETs with varying gate oxide thickness [PDF]
, 2002 The low-frequency noise power spectral density of MOSFETs is decreased if the MOSFETs are periodically switched 'off' (switched bias conditions). The influence of the gate oxide thickness on fixed bias and switched biased low frequency drain current ...
Knitel, M.J. +3 more
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The Spectral Function for Finite Nuclei in the Local Density Approximation [PDF]
, 1994 The spectral function for finite nuclei is computed within the framework of the Local Density Approximation, starting from nuclear matter spectral functions obtained with a realistic nucleon-nucleon interaction. The spectral function is decomposed into a
de Guerra, E. Moya +2 more
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Universal sum and product rules for random matrices
, 2010 The spectral density of random matrices is studied through a quaternionic generalisation of the Green's function, which precisely describes the mean spectral density of a given matrix under a particular type of random perturbation.
Rogers, Tim
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Density-matrix renormalisation group approach to quantum impurity problems
, 2003 A dynamic density-matrix renormalisation group approach to the spectral properties of quantum impurity problems is presented. The method is demonstrated on the spectral density of the flat-band symmetric single-impurity Anderson model.
Berkovits R +30 more
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Discrimination of spectral density [PDF]
The Journal of the Acoustical Society of America, 1985 Experiments were performed to determine the ability of human listeners to discriminate between a sound with a large number of spectral components in a band, of given characteristic frequency and bandwidth, and a sound with a smaller number of components in that band.
W. M. Hartmann, Stephen McAdams
openaire +1 more source
Spectral analysis of stationary random bivariate signals
, 2017 A novel approach towards the spectral analysis of stationary random bivariate signals is proposed. Using the Quaternion Fourier Transform, we introduce a quaternion-valued spectral representation of random bivariate signals seen as complex-valued ...
Bihan, Nicolas Le +2 more
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A note on a Mar\v{c}enko-Pastur type theorem for time series [PDF]
, 2011 In this note we develop an extension of the Mar\v{c}enko-Pastur theorem to time series model with temporal correlations. The limiting spectral distribution (LSD) of the sample covariance matrix is characterised by an explicit equation for its Stieltjes ...
Bai +10 more
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