Results 11 to 20 of about 17,604 (190)
Multicritical Fermi Surface Topological Transitions [PDF]
Physical Review Letters, 2019 A wide variety of complex phases in quantum materials are driven by electron-electron interactions, which are enhanced through density of states peaks. A well known example occurs at van Hove singularities where the Fermi surface undergoes a topological transition.
Dmitry V. Efremov +5 more
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Topological Transitivity of Shift Similar Operators on Nonseparable Hilbert Spaces
Journal of Function Spaces, 2021 In this paper, we investigate topological transitivity of operators on nonseparable Hilbert spaces which are similar to backward weighted shifts.
Andriy Zagorodnyuk, Zoriana Novosad
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IEEE Transactions on Power Systems, 2022 Network topology has significant impacts on operational performance of power systems. While extensive research efforts have been devoted to optimization of network topology for improving various system performances, the problem of how to transition from the initial topology to the desired optimal topology requires study.
Tong Han, David J. Hill, Yue Song
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Topological quantum phase transitions in topological superconductors [PDF]
EPL (Europhysics Letters), 2010 5 pages, no ...
DIAMANTINI, MARIA CRISTINA +2 more
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IEEE Transactions on Power Systems, 2023 The topology transition problem of transmission networks is becoming increasingly crucial with topological flexibility more widely leveraged to promote high renewable penetration. This paper proposes a novel methodology to address this problem. Aiming at achieving a bumpless topology transition regarding both static and dynamic performance, this ...
Tong Han, Yue Song, David J. Hill
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Topological transitivity of translation operators in a non-separable Hilbert space
Karpatsʹkì Matematičnì Publìkacìï, 2023 We consider a Hilbert space of entire analytic functions on a non-separable Hilbert space, associated with a non-separable Fock space. We show that under some conditions operators, like the differentiation operators and translation operators, are ...
Z.H. Novosad
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Topological Phase Transitions [PDF]
, 1998 This chapter aims to develop a systematic theory of topological phase transitions (TPTs) and explores a few typical examples, including (1) quantum phase transitions (QPTs), (2) galactic spiral structures, (3) electromagnetic eruptions on solar surface, (4) boundary-layer separation of fluid flows, and (5) interior separation of fluid flows.
Tian Ma, Shouhong Wang
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On some kinds of dense orbits in general nonautonomous dynamical systems
Nonautonomous Dynamical Systems, 2020 We study the theory of universality for the nonautonomous dynamical systems from topological point of view related to hypercyclicity. The conditions are provided in a way that Birkhoff transitivity theorem can be extended.
Pourbarat Mehdi
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Quantum causal histories [PDF]
, 1999 Quantum causal histories are defined to be causal sets with Hilbert spaces attached to each event and local unitary evolution operators. The reflexivity, antisymmetry, and transitivity properties of a causal set are preserved in the quantum history as ...
Ambjorn J +16 more
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On multi-transitivity with respect to a vector [PDF]
, 2014 A topological dynamical system $(X,f)$ is said to be multi-transitive if for every $n\in\mathbb{N}$ the system $(X^{n}, f\times f^{2}\times \dotsb\times f^{n})$ is transitive.
Chen, Zhijing, Li, Jian, Lü, Jie
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