Models of Poverty and Planned Change: A Framework for Synthesis

Recent discussions of planned social change have organized interventive strategies into models which identify underlying philosophical assumptions, value orientations, and political perspectives. Two papers published in 1965 can be taken as the beginning of this model-building discussion: Richard Walton proposed a dichotomy between attitude change and power strategies, and Roland Warren outlined a continuum from collaborative through campaign to contest strategies. In the subsequent literature, three publications stand out as major formulations of models of planned social change. What is particularly striking is that each develops a trichotomous typology of change strategies. Jack Rothman (1968) formulates the Locality Development, Social Planning, and Social Action models; Robert Chin and Kenneth Benne (1969) formulate the Rational-Empirical, Normative/Re-Educative, and Power- Coercive models; and James Crowfoot and Mark Chesler (1974) formulate the Countercultural, Professional-Technical, and Political model

Appalachia in the Sixties: Decade of Reawakening

In The Southern Appalachian Region: A Survey, published by the University Press of Kentucky in 1962, Rupert Vance suggested a decennial review of the region\u27s progress. No systematic study comparable to that made at the beginning of the decade is available to answer the question of how far Appalachia has come since then, but David S. Walls and John B. Stephenson have assembled a broad range of firsthand reports which together convey the story of Appalachia in the sixties. These observations of journalists, field workers, local residents, and social scientists have been gathered from a variety of sources ranging from national magazines to county weeklies. Focusing mainly on the coalfields of West Virginia, eastern Kentucky, southwestern Virginia, and north-central Tennessee, the editors first present selections that reflect the rediscovery” of the region as a problem area in the early sixties and describe the federal programs designed to rehabilitate it and their results. Other sections focus on the politics of the coal industry, the extent and impact of the continued migration from the region, and the persistence of human suffering and environmental devastation. A final section moves into the 1970s with proposals for the future. Although they conclude that there is little ground for claiming success in solving the region\u27s problems, the editors find signs of hope in the scattered movements toward grass-roots organization described by some of the contributors, and in the new tendency to define solutions in terms of reconstruction rather than amelioration. David S. Walls, professor emeritus of sociology at Sonoma State University, served on the staff of the Appalachian Volunteers, doing community-organizing work in central Appalachia. He is the author of The Activist\u27s Almanac: The Concerned Citizen\u27s Guide to the Leading Advocacy Organizations in America. John B. Stephenson, a native of the Appalachian mountains, was the first director of the Appalachian Center at the University of Kentucky and served as the president of Berea College from 1984 to 1994. He was the author of numerous books including Shiloh: A Mountain Community.https://uknowledge.uky.edu/upk_appalachian_studies/1005/thumbnail.jp

Scheme for teleportation of quantum states onto a mechanical resonator

We propose an experimentally feasible scheme to teleport an unkown quantum state onto the vibrational degree of freedom of a macroscopic mirror. The quantum channel between the two parties is established by exploiting radiation pressure effects.Comment: 5 pages, 2 figures, in press on PR

Single cold atom as efficient stationary source of EPR-entangled light

The Stokes and anti-Stokes components of the spectrum of resonance fluorescence of a single trapped atom, which originate from the mechanical coupling between the scattered photons and the quantized motion of the atomic center of mass, exhibit quantum correlations which are of two-mode-squeezing type. We study and demonstrate the build-up of such correlations in a specific setup, which is experimentally accessible, and where the atom acts as efficient and continuous source of EPR-entangled, two-mode squeezed light

Generating continuous variable quantum codewords in the near-field atomic lithography

Recently, D. Gottesman et al. [Phys. Rev. A 64, 012310 (2001)] showed how to encode a qubit into a continuous variable quantum system. This encoding was realized by using non-normalizable quantum codewords, which therefore can only be approximated in any real physical setup. Here we show how a neutral atom, falling through an optical cavity and interacting with a single mode of the intracavity electromagnetic field, can be used to safely encode a qubit into its external degrees of freedom. In fact, the localization induced by a homodyne detection of the cavity field is able to project the near-field atomic motional state into an approximate quantum codeword. The performance of this encoding process is then analyzed by evaluating the intrinsic errors induced in the recovery process by the approximated form of the generated codeword.Comment: 9 pages, 5 figure

Quantum-limited force measurement with an optomechanical device

We study the detection of weak coherent forces by means of an optomechanical device formed by a highly reflecting isolated mirror shined by an intense and highly monochromatic laser field. Radiation pressure excites a vibrational mode of the mirror, inducing sidebands of the incident field, which are then measured by heterodyne detection. We determine the sensitivity of such a scheme and show that the use of an entangled input state of the two sideband modes improves the detection, even in the presence of damping and noise acting on the mechanical mode.Comment: 8 pages, 4 figure

Motional Squashed States

We show that by using a feedback loop it is possible to reduce the fluctuations in one quadrature of the vibrational degree of freedom of a trapped ion below the quantum limit. The stationary state is not a proper squeezed state, but rather a ``squashed'' state, since the uncertainty in the orthogonal quadrature, which is larger than the standard quantum limit, is unaffected by the feedback action.Comment: 8 pages, 2 figures, to appear in the special Issue "Quantum Correlations and Fluctuations" of J. Opt.

Optomechanical scheme for the detection of weak impulsive forces

We show that a cooling scheme and an appropriate quantum nonstationary strategy can be used to improve the signal to noise ratio for the optomechanical detection of weak impulsive forces.Comment: 4 pages, Revtex, 1 figur