Results 21 to 30 of about 663,196 (288)
Ground states of Heisenberg evolution operator in discrete three-dimensional space-time and quantum discrete BKP equations [PDF]
, 2009 In this paper we consider three-dimensional quantum q-oscillator field theory without spectral parameters. We construct an essentially big set of eigenstates of evolution with unity eigenvalue of discrete time evolution operator.
Bazhanov V V +12 more
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Gabor representations of evolution operators
Transactions of the American Mathematical Society, 2015 We perform a time-frequency analysis of Fourier multipliers and, more generally, pseudodifferential operators with symbols of Gevrey, analytic and ultra-analytic regularity. As an application we show that Gabor frames, which provide optimally sparse decompositions for Schrödinger-type propagators, reveal to be an even more efficient tool for ...
CORDERO, Elena +2 more
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Noise corrections to stochastic trace formulas [PDF]
, 2001 We review studies of an evolution operator L for a discrete Langevin equation with a strongly hyperbolic classical dynamics and a Gaussian noise. The leading eigenvalue of L yields a physically measurable property of the dynamical system, the escape rate
Dettmann, Carl Philip +4 more
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Evolution algebras whose evolution operator is a homomorphism [PDF]
Computational and Mathematical Methods, 2021 This article deals with the evolution operator of evolution algebras. We give a theorem that allows to characterize these algebras when this operator is a homomorphism of algebras of rank n-2 and this result in turn allows us to extend the classification of this type of algebras, given in a previous result by ourselves in 2021, up to the case of ...
Fernández Ternero, Desamparados +2 more
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On some dichotomy concepts with different growth rates for evolution operators in Banach spaces
Annals of the West University of Timisoara: Mathematics and Computer Science, 2015 This paper treats three concepts of (h, k)-dichotomy and their correspondents in the uniform cases. The connections between them are established through examples and counterexamples presented on the Banach space of square-summable sequences of real ...
Seimeanu Nicolae Marian
doaj +1 more source
Neutrino oscillations with three flavors in matter of varying density [PDF]
, 2001 In this paper, we discuss the evolution operator and the transition probabilities expressed as functions of the vacuum mass squared differences, the vacuum mixing angles, and the matter density parameter for three flavor neutrino oscillations in matter ...
Ohlsson, Tommy, Snellman, Hakan
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On a logarithmic criterion for uniform polynomial stability
Annals of the West University of Timisoara: Mathematics and Computer Science, 2018 The paper presents a logarithmic criterion for uniform polynomial stability of evolution operators in Banach spaces. As applications, another four characterizations of uniform polynomial stability are obtained.
Boruga Rovana, Megan Mihail
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Duality between operator ordering factor and massless scalar field
European Physical Journal C: Particles and Fields, 2022 In order to investigate the role of quantum effects in the evolution of the universe, one can either use the Wheeler–DeWitt equation (WDWE) that contains an operator ordering factor, or add an item called massless scalar field to WDWE.
Dongshan He, Qing-yu Cai
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Explicit definition of $\mathcal{PT}$ symmetry for non-unitary quantum walks with gain and loss [PDF]
, 2016 $\mathcal{PT}$ symmetry, that is, a combined parity and time-reversal symmetry is a key milestone for non-Hermite systems exhibiting entirely real eigenenergy. In the present work, motivated by a recent experiment, we study $\mathcal{PT}$ symmetry of the
Kim, Dakyeong +2 more
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Boundary controllability of impulsive integrodifferential evolution systems with time-varying delays
Journal of Taibah University for Science, 2018 In this paper, authors studied the boundary controllability results for neutral impulsive integrodifferential evolution systems with time-varying delays in Banach spaces.
B. Radhakrishnan, P. Chandru
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