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in subjects: "657002 -- Theoretical & Mathematical Physics-- Classical & Quantum Mechanics"

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Bell's theorem without hidden variables

The CHSH inequality is demonstrated from locality alone without using either determinism or the concept of hidden variables. Then a comment is made about the violation of this inequality by quantum theory. (JFP)

Date: May 1, 1976

Creator: Eberhard, P. H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Geometric Hamiltonian structures and perturbation theory

We have been engaged in a program of investigating the Hamiltonian structure of the various perturbation theories used in practice. We describe the geometry of a Hamiltonian structure for non-singular perturbation theory applied to Hamiltonian systems on symplectic manifolds and the connection with singular perturbation techniques based on the method of averaging.

Date: August 1, 1984

Creator: Omohundro, S.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Correlation experiments and the nonvalidity of ordinary ideas about the physical world

It is shown that the predictions of quantum theory in certain correlations experiments are incompatible with ordinary ideas about the physical world. In particular the following theorem is proved: Consider situations involving two experimenters, one working in each of two space-like separated regions. Suppose each is apparently free to choose to perform in his region one of two alternative experiments. Assume that the results that would be obtained in each of the alternative cases conform to th… more

Date: July 9, 1976

Creator: Stapp, H. P.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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State space forecasting and noise reduction

We discuss the effects of nonlinearity and noise on the problem of finding states and dynamics. We point out problems which arise in the construction of state space models for scalar time series. We describe solutions for the case when error due to noise dominates parameter estimation error and outline a framework for the general case.

Date: January 1, 1990

Creator: Eubank, Stephen; Casdagli, Martin; Farmer, J. Doyne & Gibson, John

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Center of buoyancy definition

The center of buoyancy of an arbitrary shaped body is defined in analogy to the center of gravity. The definitions of the buoyant force and center of buoyancy in terms of integrals over the area of the body are converted to volume integrals and shown to have simple intuitive interpretations.

Date: December 1, 1988

Creator: Sandberg, V.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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On the computer simulation of the EPR-Bohm experiment

We argue that supraluminal correlation without supraluminal signaling is a necessary consequence of any finite and discrete model for physics. Every day, the commercial and military practice of using encrypted communication based on correlated, pseudo-random signals illustrates this possibility. All that is needed are two levels of computational complexity which preclude using a smaller system to detect departures from ''randomness'' in the larger system. Hence the experimental realizations of … more

Date: December 1, 1988

Creator: McGoveran, D. O.; Noyes, H. P. & Manthey, M. J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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The statistical properties of electromagnetic fields with application to radiation and scattering

Determining the relationships between different average values is an important step in any physics-based statistical theory. If these relationships exist and exhibit certain properties, then probability densities or distributions can be assigned to the field variables and the transition from an average-value theory'' to a statistical theory'' is complete. For electromagnetics, no such average-value relationships have been demonstrated to exist. The derivation of these relationships and their ra… more

Date: January 1, 1991

Creator: Lehman, T.H. (Lehman (T.H.), Albuquerque, NM (USA)) & Miller, E.K. (Los Alamos National Lab., NM (USA))

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Maxwell's demon, Szilard's engine and quantum measurements

We propose and analyze a quantum version of Szilard's one-molecule engine. In particular, we recover, in the quantum context, Szilard's conclusion concerning the free energy cost of measurements: ..delta..F greater than or equal to k/sub B/T1n2 per bit of information.

Date: January 1, 1984

Creator: Zurek, W.H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Hierarchical diffusion

We review the solution and properties of the diffusion equation in a hierarchical or ultrametric space. 11 refs.

Date: February 1, 1988

Creator: Bachas, C. P.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Einstein locality, EPR locality, and the significance for science of the nonlocal character of quantum theory

The immense difference between Einstein locality and EPR locality is discussed. The latter provides a basis for establishing the nonlocal character of quantum theory, whereas the former does not. A model representing Heisenberg's idea of physical reality is introduced. It is nondeterministic and holistic: the objects, measuring devices, and their environment are treated as an inseparable entity, with, however, macroscopically localizable attributes. The EPR principle that no disturbance can pro… more

Date: October 1, 1985

Creator: Stapp, Henry P.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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From bit-strings (part way) to quaternions

We present work in progress on constructing rotations and boosts from bit strings, and a mapping of bit-strings onto integer quaternion coordinates.

Date: April 5, 1991

Creator: Noyes, H. Pierre

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Quantum measurement and the mind-brain connection

It is argued that quantum measurements do pose a problem, within the context created by the fundamental aim of science, which is identified as the construction of a cohesive, comprehensive, and rationally coherent idea of the nature of the world in which we live. Models of nature are divided into two classes: (1), those in which there is a selection process that, for any possible measurement, would, if that measurement were to be performed, pick out one single outcome, and, (2), all others. It … more

Date: October 17, 1990

Creator: Stapp, Henry P.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Quantum ontologies

Quantum ontologies are conceptions of the constitution of the universe that are compatible with quantum theory. The ontological orientation is contrasted to the pragmatic orientation of science, and reasons are given for considering quantum ontologies both within science, and in broader contexts. The principal quantum ontologies are described and evaluated. Invited paper at conference: Bell's Theorem, Quantum Theory, and Conceptions of the Universe, George Mason University, October 20-21, 1988.… more

Date: December 1, 1988

Creator: Stapp, Henry P.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Note on Zeno's paradox in quantum theory

A decaying quantum system, if observed very frequently in order to ascertain whether or not it is still undecayed, will not decay at all. The derivation of this effect - known, e.g., as Zeno's paradox - has been criticized recently. It has been argued that measurements performed in a very short time interval, ..delta..t, produce states with a very large energy uncertanty, ..delta..E, and that Zeno's paradox disappears if this is taken into account. By construction of an explicit counterexample … more

Date: February 1, 1980

Creator: Kraus, K.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Destruction of the fractional quantum Hall effect by disorder

It is suggested that Hall steps in the fractional quantum Hall effect are physically similar to those in the ordinary quantum Hall effect. This proposition leads to a simple scaling diagram containing a new type of fixed point, which is identified with the destruction of the fractional states by disorder. 15 refs., 3 figs.

Date: July 1, 1985

Creator: Laughlin, R.B.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Red-shift experiments and non-Newtonian gravitational forces

The contribution of scalar non-Newtonian gravitational forces to the gravitational red-shifts is derived. The constraints imposed on scalar couplings by red-shift experiments are shown to be not competitive with those imposed by geophysical inverse-square-law experiments. 7 refs.

Date: January 1, 1989

Creator: Hughes, R.J.; Goldman, T. & Nieto, M.M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Algorithms and computer codes for atomic and molecular quantum scattering theory. Volume I

The goals of this workshop are to identify which of the existing computer codes for solving the coupled equations of quantum molecular scattering theory perform most efficiently on a variety of test problems, and to make tested versions of those codes available to the chemistry community through the NRCC software library. To this end, many of the most active developers and users of these codes have been invited to discuss the methods and to solve a set of test problems using the LBL computers. … more

Date: January 1, 1979

Creator: Thomas, L. (ed.)

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Finite and discrete relativistic quantum mechanics

No Description Available.

Date: March 28, 1989

Creator: Noyes, H. Pierre

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Repetitive Stern-Gerlach Effect

I show that two spin rotators 180{degree} apart may be desirable for the repetitive Stern-Gerlach effect. I also calculate the effect of depolarization resonance on the repetitive Stern-Gerlach effect. It is shown that to first order in resonance strength, we can avoid the imperfection resonance if the energy of the beam is at G{gamma} = n + 1/2. The time available for accumulating the Stern-Gerlach kick is then limited by the intrinsic resonance. 5 refs., 1 fig.

Date: March 13, 1990

Creator: Hsueh, S.-Y.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Symmetries of some hypergeometric series: Implications for 3j- and 6j-coefficients

The occurrence of generalized hypergeometric series as factors, in the Wigner-Clebsch-Gordan (3j) and Racah (6j) coefficients is well known. The recently discovered S/sub 5/ symmetry of the Saalscheutzian /sub 4/F/sub 3/ series may be used to extend the symmetries of the 6j-coefficients to the much larger group generated by S/sub 5/ and the group of Regge symmetries. (A similar extension may be carried out for the 3j-coefficients). The required extension of the domain of definition of the 6j-co… more

Date: October 1, 1986

Creator: Louck, J. D.; Beyer, W. A.; Biedenharn, L. C. & Stein, P. R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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On the discrete reconciliation of relativity and quantum mechanics

A way is sketched to replace physics based on arbitrary units of mass, length, and time by counting in terms of these quantized values and to replace continuum mathematical physics by computer science. The consequences of such a discrete physics are summarized. These are obtained by postulating finiteness, discreteness, finite computability, absolute non-uniqueness, and additivity. (LEW)

Date: March 1, 1987

Creator: Noyes, H. Pierre

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Spins of cyons and dyons

We examine the meaning of the angular momentum of cyons in some detail and compare the cyon case with the more familiar case of the dyon composed of a spinless electron bound by a scalar force to a spinless magnetic monopole. This treatment differs from others not primarily in its results, but in its central point that those results follow from very simple and general properties of the angular momentum in the electromagnetic field. 6 refs., 4 figs.

Date: January 1, 1985

Creator: Lipkin, H. J. & Peshkin, M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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The behavior of matter under nonequilibrium conditions: Fundamental aspects and applications. Progress Report for period April 15, 1990 - April 14, 1991

Our report contains a brief summary of what has been achieved over the period of the contract. We have studied the behavior of matter under equilibrium conditions on three levels: (1) on the microscopic level in the frame of classical mechanics or of quantum theory; (2) on the stochastic level, which includes fluctuations; and (3) on the phenomenological, macroscopic level described by nonlinear equations. We first report on the level (1), then report on the levels (2) and (3).

Date: December 1, 1990

Creator: Prigogine, I.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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A self-similar approach to the explosion of droplets by a high energy laser beam

A model has been constructed in which a small droplet is exploded by the absorption of energy from a high energy laser beam. The beam flux is so high that it is assumed that a plasma is formed. A single-fluid model of a plasma droplet interacting with laser radiation is used. Selfsimilarity is invoked to reduce the spherically symmetric problem involving hydrodynamics and Maxwell's equations to quadrature. It is shown analytically that the model reproduces in qualitative manner certain features… more

Date: December 30, 1986

Creator: Chitanvis, S.M.

Item Type: Article

Partner: UNT Libraries Government Documents Department