Results 21 to 30 of about 49,185 (121)
Invariant Subspaces for a Semigroup of Linear Operators
Indagationes Mathematicae (Proceedings), 1965 Following result is shown using similar arguments to those in the author's previous work [Isr. J. Math. 2, 19--26 (1964; Zbl 0131.33101)]. Let \(E\) be a locally convex Hausdorff space, and \(H\) a closed subspace in \(E\) of finite codimension \(n\). Let \(X\) be a set in \(E\) having the following properties: (1) \(X \cap (x + H)\) is compact convex ...
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, 2016 In this paper we discuss the problem of decomposition for unbounded $2\times 2$ operator matrices by a pair of complementary invariant graph subspaces.
Makarov, Konstantin A. +2 more
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On model reduction for quantum dynamics: symmetries and invariant subspaces
, 2014 Simulation of quantum dynamics is a grand challenge of computational physics. In this work we investigate methods for reducing the demands of such simulation by identifying reduced-order models for dynamics generated by parameterized quantum Hamiltonians.
Kumar, Akshat, Sarovar, Mohan
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Classification of linear differential operators with an invariant subspace of monomials
Russian journal of mathematical physics, 1993 10 ...
Post, Gerhard F., Turbiner, A.
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Dichotomous Hamiltonians with Unbounded Entries and Solutions of Riccati Equations
, 2013 An operator Riccati equation from systems theory is considered in the case that all entries of the associated Hamiltonian are unbounded. Using a certain dichotomy property of the Hamiltonian and its symmetry with respect to two different indefinite inner
C. R. Kuiper +16 more
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, 2023 In the paper we investigate two partial orders on standard Young tableaux and show their applications in the theory of invariant subspaces of nilpotent linear operators.
Kaniecki, Mariusz, Kosakowska, Justyna
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On Protected Realizations of Quantum Information
, 2006 There are two complementary approaches to realizing quantum information so that it is protected from a given set of error operators. Both involve encoding information by means of subsystems.
D. G. Cory +4 more
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Dynamics of Totally Constrained Systems II. Quantum Theory
, 1995 In this paper a new formulation of quantum dynamics of totally constrained systems is developed, in which physical quantities representing time are included as observables.
Kodama, Hideo
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, 2015 We investigate convergence properties of discrete-time semigroup quantum dynamics, including asymptotic stability, probability and speed of convergence to pure states and subspaces.
Cirillo, Giuseppe Ilario +1 more
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Finite dimensional invariant subspaces for algebras of linear operators and amenable Banach algebras
Linear Algebra and its Applications, 2016 Let \( A\) be a Banach algebra and \(\phi\) be a character on \( A\). The authors consider \(P_1( A, \phi)\), the set of all \(\phi\)-maximal elements of \(A\), and also representations of this semigroup on separated locally convex vector spaces. They study a finite-dimensional property in terms of amenability of the closed linear span of \(P_1( A ...
Nasr-Isfahani, Rasoul +2 more
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