6,809 research outputs found
Business School_BUA 325 Final Zoom Class Slides
Class presentation slides for University of Maine Course BUA 325, from John N. Angelis, Visiting Assistant Professor of Operations Management, University of Maine. The slides include the question How will Business change post-Corona? (slide 7)
Business School_BUA 325 Changes Due To Coronavirus in Work
Material for University of Maine Course BUA 325, from John N. Angelis, Visiting Assistant Professor of Operations Management, University of Maine, regarding changes due to Coronavirus in work from Dumb Wealth
Business School_BUA 325 Dealing With Coronavirus Layoffs Paper Assignment
Description of assignment for University of Maine Course BUA 325 on Dealing With Coronavirus Layoffs, from John N. Angelis, Visiting Assistant Professor of Operations Management, University of Maine
Analytical probabilistic approach to the ground state of lattice quantum systems: exact results in terms of a cumulant expansion
We present a large deviation analysis of a recently proposed probabilistic
approach to the study of the ground-state properties of lattice quantum
systems. The ground-state energy, as well as the correlation functions in the
ground state, are exactly determined as a series expansion in the cumulants of
the multiplicities of the potential and hopping energies assumed by the system
during its long-time evolution. Once these cumulants are known, even at a
finite order, our approach provides the ground state analytically as a function
of the Hamiltonian parameters. A scenario of possible applications of this
analyticity property is discussed.Comment: 26 pages, 5 figure
Business School_BUA 337 Brief Blackboard Comments
Blackboard Announcement Update in April for University of Maine Course BUA 337, from John N. Angelis, Visiting Assistant Professor of Operations Management, University of Maine, regarding how class topics are affected by COVID-19
Shell Model of Two-dimensional Turbulence in Polymer Solutions
We address the effect of polymer additives on two dimensional turbulence, an
issue that was studied recently in experiments and direct numerical
simulations. We show that the same simple shell model that reproduced drag
reduction in three-dimensional turbulence reproduces all the reported effects
in the two-dimensional case. The simplicity of the model offers a
straightforward understanding of the all the major effects under consideration
Exact ground state for a class of matrix Hamiltonian models: quantum phase transition and universality in the thermodynamic limit
By using a recently proposed probabilistic approach, we determine the exact
ground state of a class of matrix Hamiltonian models characterized by the fact
that in the thermodynamic limit the multiplicities of the potential values
assumed by the system during its evolution are distributed according to a
multinomial probability density. The class includes i) the uniformly fully
connected models, namely a collection of states all connected with equal
hopping coefficients and in the presence of a potential operator with arbitrary
levels and degeneracies, and ii) the random potential systems, in which the
hopping operator is generic and arbitrary potential levels are assigned
randomly to the states with arbitrary probabilities. For this class of models
we find a universal thermodynamic limit characterized only by the levels of the
potential, rescaled by the ground-state energy of the system for zero
potential, and by the corresponding degeneracies (probabilities). If the
degeneracy (probability) of the lowest potential level tends to zero, the
ground state of the system undergoes a quantum phase transition between a
normal phase and a frozen phase with zero hopping energy. In the frozen phase
the ground state condensates into the subspace spanned by the states of the
system associated with the lowest potential level.Comment: 31 pages, 13 figure
Business School_Response To Request for Syllabi/Information About Pandemic-Related Courses and Activities Email
Email thread of the response from the Maine School Business to the request for syllabi/information about pandemic-related courses and activities from the Provost Office. Content was submitted by John N. Angelis, Visiting Assistant Professor of Operations Management, University of Maine to Niclas Erhardt, Associate Dean, Maine Business School, University of Maine
Quantum Information and Wave function Collapse
Inofrmation-theoretical restrictions on information transferred in the
measurement of object S by information system O are studied. It is shown that
such constraints, induced by Heisenberg commutation relations, result in the
loss of information about the purity of S state. Consequently, it becomes
impossible for O to discriminate pure and mixed S states. In individual events
this effect is manifested by the stochastic outcomes of pure S state
measurement, i.e. the collapse of pure S state.Comment: 8 pages, talk given on Simposium 'Frontiers of fundamental Physics',
Udine, Italy, January 2008, to appear in Proceeding
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