4,129 research outputs found
H*-algebras and nonunital Frobenius algebras: first steps in infinite-dimensional categorical quantum mechanics
A certain class of Frobenius algebras has been used to characterize
orthonormal bases and observables on finite-dimensional Hilbert spaces. The
presence of units in these algebras means that they can only be realized
finite-dimensionally. We seek a suitable generalization, which will allow
arbitrary bases and observables to be described within categorical
axiomatizations of quantum mechanics. We develop a definition of H*-algebra
that can be interpreted in any symmetric monoidal dagger category, reduces to
the classical notion from functional analysis in the category of (possibly
infinite-dimensional) Hilbert spaces, and hence provides a categorical way to
speak about orthonormal bases and quantum observables in arbitrary dimension.
Moreover, these algebras reduce to the usual notion of Frobenius algebra in
compact categories. We then investigate the relations between nonunital
Frobenius algebras and H*-algebras. We give a number of equivalent conditions
to characterize when they coincide in the category of Hilbert spaces. We also
show that they always coincide in categories of generalized relations and
positive matrices.Comment: 29 pages. Final versio
The Kinetic Basis of Self-Organized Pattern Formation
In his seminal paper on morphogenesis (1952), Alan Turing demonstrated that
different spatio-temporal patterns can arise due to instability of the
homogeneous state in reaction-diffusion systems, but at least two species are
necessary to produce even the simplest stationary patterns. This paper is aimed
to propose a novel model of the analog (continuous state) kinetic automaton and
to show that stationary and dynamic patterns can arise in one-component
networks of kinetic automata. Possible applicability of kinetic networks to
modeling of real-world phenomena is also discussed.Comment: 8 pages, submitted to the 14th International Conference on the
Synthesis and Simulation of Living Systems (Alife 14) on 23.03.2014, accepted
09.05.201
Logic is to the quantum as geometry is to gravity
I will propose that the reality to which the quantum formalism implicitly
refers is a kind of generalized history, the word history having here the same
meaning as in the phrase sum-over-histories. This proposal confers a certain
independence on the concept of event, and it modifies the rules of inference
concerning events in order to resolve a contradiction between the idea of
reality as a single history and the principle that events of zero measure
cannot happen (the Kochen-Specker paradox being a classic expression of this
contradiction). The so-called measurement problem is then solved if macroscopic
events satisfy classical rules of inference, and this can in principle be
decided by a calculation. The resulting conception of reality involves neither
multiple worlds nor external observers. It is therefore suitable for quantum
gravity in general and causal sets in particular.Comment: plainTeX, 26 pages, 2 figures. To appear in G.F.R. Ellis, J. Murugan
and A. Weltman (eds), {\it Foundations of Space and Time} (Cambridge
University Press). Most current version is available at
http://www.perimeterinstitute.ca/personal/rsorkin/some.papers/ (or wherever
my home-page may be)
Three Puzzles on Mathematics, Computation, and Games
In this lecture I will talk about three mathematical puzzles involving
mathematics and computation that have preoccupied me over the years. The first
puzzle is to understand the amazing success of the simplex algorithm for linear
programming. The second puzzle is about errors made when votes are counted
during elections. The third puzzle is: are quantum computers possible?Comment: ICM 2018 plenary lecture, Rio de Janeiro, 36 pages, 7 Figure
Theoretical Engineering and Satellite Comlink of a PTVD-SHAM System
This paper focuses on super helical memory system's design, 'Engineering,
Architectural and Satellite Communications' as a theoretical approach of an
invention-model to 'store time-data'. The current release entails three
concepts: 1- an in-depth theoretical physics engineering of the chip including
its, 2- architectural concept based on VLSI methods, and 3- the time-data
versus data-time algorithm. The 'Parallel Time Varying & Data Super-helical
Access Memory' (PTVD-SHAM), possesses a waterfall effect in its architecture
dealing with the process of voltage output-switch into diverse logic and
quantum states described as 'Boolean logic & image-logic', respectively.
Quantum dot computational methods are explained by utilizing coiled carbon
nanotubes (CCNTs) and CNT field effect transistors (CNFETs) in the chip's
architecture. Quantum confinement, categorized quantum well substrate, and
B-field flux involvements are discussed in theory. Multi-access of coherent
sequences of 'qubit addressing' in any magnitude, gained as pre-defined, here
e.g., the 'big O notation' asymptotically confined into singularity while
possessing a magnitude of 'infinity' for the orientation of array displacement.
Gaussian curvature of k(k<0) is debated in aim of specifying the
2D electron gas characteristics, data storage system for defining short and
long time cycles for different CCNT diameters where space-time continuum is
folded by chance for the particle. Precise pre/post data timing for, e.g.,
seismic waves before earthquake mantle-reach event occurrence, including time
varying self-clocking devices in diverse geographic locations for radar systems
is illustrated in the Subsections of the paper. The theoretical fabrication
process, electromigration between chip's components is discussed as well.Comment: 50 pages, 10 figures (3 multi-figures), 2 tables. v.1: 1 postulate
entailing hypothetical ideas, design and model on future technological
advances of PTVD-SHAM. The results of the previous paper [arXiv:0707.1151v6],
are extended in order to prove some introductory conjectures in theoretical
engineering advanced to architectural analysi
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