Results 51 to 60 of about 5,037,194 (368)

Shape Transformation Approaches for Fluid Dynamic Optimization

open access: yesAerospace, 2023
The contribution is devoted to combined shape- and mesh-update strategies for parameter-free (CAD-free) shape optimization methods. Three different strategies to translate the shape sensitivities computed by adjoint shape optimization procedures into ...
Peter Marvin Müller   +2 more
doaj   +1 more source

A gauge model for quantum mechanics on a stratified space [PDF]

open access: yes, 2008
In the Hamiltonian approach on a single spatial plaquette, we construct a quantum (lattice) gauge theory which incorporates the classical singularities.
B.C. Hall   +50 more
core   +1 more source

Quantum theory in real Hilbert space: How the complex Hilbert space structure emerges from Poincar\'e symmetry [PDF]

open access: yes, 2016
As established by Soler, Quantum Theories may be formulated in real, complex or quaternionic Hilbert spaces only. Stuckelberg provided physical reasons for ruling out real Hilbert spaces relying on Heisenberg principle.
Valter Moretti, Marco Oppio
semanticscholar   +1 more source

A characterization of Hilbert space [PDF]

open access: yesProceedings of the American Mathematical Society, 1974
A real Banach space E of dimension _3 is an inner product space iff there exists a bounded smooth convex subset of E which is the range of a nonexpansive retraction. De Figueiredo and Karlovitz [3] have shown that if E is a strictly convex real finite-dimensional Banach space and dim E> 3 then there can exist no bounded smooth nonexpansive retract of E
openaire   +2 more sources

Ergodicity probes: using time-fluctuations to measure the Hilbert space dimension [PDF]

open access: yesQuantum, 2019
Quantum devices, such as quantum simulators, quantum annealers, and quantum computers, may be exploited to solve problems beyond what is tractable with classical computers. This may be achieved as the Hilbert space available to perform such `calculations'
Charlie Nation, Diego Porras
doaj   +1 more source

The Hilbert Space of Quantum Gravity Is Locally Finite-Dimensional [PDF]

open access: yes, 2017
We argue in a model-independent way that the Hilbert space of quantum gravity is locally finite-dimensional. In other words, the density operator describing the state corresponding to a small region of space, when such a notion makes sense, is defined on
N. Bao, S. Carroll, Ashmeet Singh
semanticscholar   +1 more source

Super Hilbert Spaces [PDF]

open access: yesCommunications in Mathematical Physics, 2000
The basic mathematical framework for super Hilbert spaces over a Grassmann algebra with a Grassmann number-valued inner product is formulated. Super Hilbert spaces over infinitely generated Grassmann algebras arise in the functional Schroedinger representation of spinor quantum field theory in a natural way.
openaire   +4 more sources

Hypercomplex quantum mechanics

open access: yes, 1995
The fundamental axioms of the quantum theory do not explicitly identify the algebraic structure of the linear space for which orthogonal subspaces correspond to the propositions (equivalence classes of physical questions).
A. A. Albert   +23 more
core   +2 more sources

Wreath products with the integers, proper actions and Hilbert space compression [PDF]

open access: yes, 2006
We prove that the properties of acting metrically properly on some space with walls or some CAT(0) cube complex are closed by taking the wreath product with \Z. We also give a lower bound for the (equivariant) Hilbert space compression of H\wr\Z in terms
Stalder, Yves, Valette, Alain
core   +5 more sources

Synthetic Hilbert Space Engineering of Molecular Qudits: Isotopologue Chemistry

open access: yesAdvances in Materials, 2019
One of the most ambitious technological goals is the development of devices working under the laws of quantum mechanics. Among others, an important challenge to be resolved on the way to such breakthrough technology concerns the scalability of the ...
W. Wernsdorfer, M. Ruben
semanticscholar   +1 more source

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