48,108 research outputs found
The Berry Paradox
Lecture given Wednesday 27 October 1993 at a Physics -- Computer Science
Colloquium at the University of New Mexico. The lecture was videotaped; this is
an edited transcript. It also incorporates remarks made at the Limits to
Scientific Knowledge meeting held at the Santa Fe Institute 24--26 May 1994.Comment: 13 pages, LaTe
Some Aspects of Classical and Quantum Phases
We study classical and quantum phases in the adiabatic Born-Oppenheimer
context. These include a classical astronomical case, the general dual
description of the phases, a new "Paradox" connected to scattering Berry phase
and its resolution and various elaboration of
topological/geometrical/non-abelian phases.Comment: 18 pages, 4 figure
On the "Causality Paradox" of Time-Dependent Density Functional Theory
I show that the so-called causality paradox of time-dependent density
functional theory arises from an incorrect formulation of the variational
principle for the time evolution of the density. The correct formulation not
only resolves the paradox in real time, but also leads to a new expression for
the causal exchange-correlation kernel in terms of Berry curvature.
Furthermore, I show that all the results that were previously derived from
symmetries of the action functional remain valid in the present formulation.
Finally, I develop a model functional theory which explicitly demonstrates the
workings of the new formulation.Comment: 21 page
Berry phase, topology, and diabolicity in quantum nano-magnets
A topological theory of the diabolical points (degeneracies) of quantum
magnets is presented. Diabolical points are characterized by their diabolicity
index, for which topological sum rules are derived. The paradox of the the
missing diabolical points for Fe8 molecular magnets is clarified. A new method
is also developed to provide a simple interpretation, in terms of destructive
interferences due to the Berry phase, of the complete set of diabolical points
found in biaxial systems such as Fe8.Comment: 4 pages, 3 figure
Service Recovery Paradox in Indian Banking Industry: an Empirical Investigation
The present study examines existence of service recovery paradox in Indian banking industry. The study is taken up in the tri-city of Chandigarh, Panchkula and Mohali. The respondents are categorized into failure and no-failure groups on the basis of their service experience. Failure group constitutes those respondents who have experienced service recovery, and has been further divided into five sub-groups ranging from service recovery++ (service recovery better than expected) to service recovery- - (service recovery worse than expected). Service recovery paradox is examined by comparing service recovery++ group with no-failure group. The study shows evidence for existence of service recovery paradox in relation to satisfaction. It has been concluded that for service recovery paradox to exist, recovery effort has to be exceptionally good and much better than expectation level of the customer. The study suggests that service managers should take service failure as an opportunity to appease customers by providing a much better than expected recovery experience. However, organizations should not plan to create service failure situations because if they falter on imparting the recovery, customer satisfaction may be influenced negatively
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