Results 11 to 20 of about 3,327 (193)
Can future systemic financial risks be quantified?: ergodic vs nonergodic stochastic processes
Brazilian Journal of Political Economy, 2009 Different axioms underlie efficient market theory and Keynes's liquidity preference theory. Efficient market theory assumes the ergodic axiom. Consequently, today's decision makers can calculate with actuarial precision the future value of all possible ...
Paul Davidson
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A Note on Ergodic Theory [PDF]
Proceedings of the American Mathematical Society, 1951 The purpose of this paper is to present solutions to certain problems in ergodic theory suggested by Einar Hille in his book Functional analysis and semi-groups [1]. 1 Let T(t) ( > 0) be a semi-group of linear bounded transformations on a complex Banach space X to itself.
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Quantum ergodicity in the SYK model
Nuclear Physics B, 2018 We present a replica path integral approach describing the quantum chaotic dynamics of the SYK model at large time scales. The theory leads to the identification of non-ergodic collective modes which relax and eventually give way to an ergodic long time ...
Alexander Altland, Dmitry Bagrets
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Two dimensional kicked quantum Ising model: dynamical phase transitions
New Journal of Physics, 2014 Using an efficient one and two qubit gate simulator operating on graphical processing units, we investigate ergodic properties of a quantum Ising spin $1/2$ model on a two-dimensional lattice, which is periodically driven by a δ -pulsed transverse ...
C Pineda, T Prosen, E Villaseñor
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Ergodic limits for inhomogeneous evolution equations
Electronic Journal of Qualitative Theory of Differential Equations, 2020 Let $u$ satisfy an inhomogeneous wave equation such as \begin{align*} u''(t)+A^{2}u(t)=h(t),\qquad u(0)=f,\quad u'(0)=g. \end{align*} We show that in many cases, the limit as $t\rightarrow \infty$ of $\frac{1}{t}\int_{0}^{t}u(s)ds$ exists, and can be ...
Behzad Rouhani +2 more
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Hyperbolic Covariant Coherent Structures in Two Dimensional Flows
Fluids, 2017 A new method to describe hyperbolic patterns in two-dimensional flows is proposed. The method is based on the Covariant Lyapunov Vectors (CLVs), which have the properties of being covariant with the dynamics, and thus, being mapped by the tangent linear ...
Giovanni Conti, Gualtiero Badin
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Ergodic conditions and spectral properties for A-contractions [PDF]
Opuscula Mathematica, 2008 In this paper the canonical representation of an \(A\)-contraction \(T\) on a Hilbert space \(\mathcal{H}\) is used to obtain some conditions concerning the concept of \(A\)-ergodicity studied in [L.
Laurian Suciu, Nicolae Suciu
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Ergodic Capacity Analysis of Downlink Communication Systems under Covariance Shaping Equalizers
Mathematics, 2022 Advances in higher-end spectrum utilization has enabled user equipment to dock multiple antenna elements, and hence make use of selectivity via equalization in new generation of mobile networks.
Ubaid M. Al-Saggaf +2 more
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Extended eigenstate thermalization and the role of FZZT branes in the Schwarzian theory
Journal of High Energy Physics, 2020 In this paper we provide a universal description of the behavior of the basic operators of the Schwarzian theory in pure states. When the pure states are energy eigenstates, expectation values of non-extensive operators are thermal. On the other hand, in
Pranjal Nayak +2 more
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Ergodicity test of the eddy-covariance technique [PDF]
Atmospheric Chemistry and Physics, 2015 The ergodic hypothesis is a basic hypothesis typically invoked in atmospheric surface layer (ASL) experiments. The ergodic theorem of stationary random processes is introduced to analyse and verify the ergodicity of atmospheric turbulence measured using ...
J. Chen, Y. Hu, Y. Yu, S. Lü
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