Results 31 to 40 of about 160,382 (249)
Limit operators, collective compactness, and the spectral theory of infinite matrices [PDF]
, 2010 In the first half of this memoir we explore the interrelationships between the abstract theory of limit operators (see e.g. the recent monographs of Rabinovich, Roch and Silbermann (2004) and Lindner (2006)) and the concepts and results of the ...
Chandler-Wilde, Simon N., Lindner, Marko
core +3 more sources
Lieb-Robinson bounds and out-of-time order correlators in a long-range spin chain
Physical Review Research, 2020 Lieb-Robinson bounds quantify the maximal speed of information spreading in nonrelativistic quantum systems. We discuss the relation of Lieb-Robinson bounds to out-of-time order correlators, which correspond to different norms of commutators C(r,t)=[A_{i}
Luis Colmenarez, David J. Luitz
doaj +1 more source
Diagonalization of multicomponent wave equations with a Born-Oppenheimer example [PDF]
, 1993 A general method to decouple multicomponent linear wave equations is presented. First, the Weyl calculus is used to transform operator relations into relations between c-number valued matrices.
A. Dalgarno +20 more
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Linear Algebra and its Applications, 2012 The authors develop a quantitative perturbation theory for the approximation of stability spectra of sequences of infinite dimensional operators based on an infinite dimensional \(QR\) technique for determining Lyapunov exponents and Sacker-Sell spectrum. The results apply also in the case of stable but not necessarily distinct Lyapunov exponents.
Badawy, M., Van Vleck, E.
openaire +1 more source
Non-Renormalization and Naturalness in a Class of Scalar-Tensor Theories
, 2012 We study the renormalization of some dimension-4, 7 and 10 operators in a class of nonlinear scalar-tensor theories. These theories are invariant under: (a) linear diffeomorphisms which represent an exact symmetry of the full non-linear action, and (b ...
de Rham, Claudia +3 more
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Growing pseudo-eigenmodes and positive logarithmic norms in rotating shear flows
, 2011 Rotating shear flows, when angular momentum increases and angular velocity decreases as functions of radiation coordinate, are hydrodynamically stable under linear perturbation.
Banibrata Mukhopadhyay +9 more
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Hadronic Lorentz Violation in Chiral Perturbation Theory Including the Coupling to External Fields [PDF]
, 2018 If any violation of Lorentz symmetry exists in the hadron sector, its ultimate origins must lie at the quark level. We continue the analysis of how the theories at these two levels are connected, using chiral perturbation theory. Considering a two-flavor
Altschul, Brett +2 more
core +4 more sources
FEBS Letters, EarlyView.This perspective highlights emerging insights into how the circadian transcription factor CLOCK:BMAL1 regulates chromatin architecture, cooperates with other transcription factors, and coordinates enhancer dynamics. We propose an updated framework for how circadian transcription factors operate within dynamic and multifactorial chromatin landscapes ...
Xinyu Y. Nie, Jerome S. Menet
wiley +1 more source
Effective Field Theory of Broken Spatial Diffeomorphisms [PDF]
, 2015 We study the low energy effective theory describing gravity with broken spatial diffeomorphism invariance. In the unitary gauge, the Goldstone bosons associated with broken diffeomorphisms are eaten and the graviton becomes a massive spin-2 particle with
Labun, Lance Z., Lin, Chunshan
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Time after time – circadian clocks through the lens of oscillator theory
FEBS Letters, EarlyView.Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo +2 more
wiley +1 more source