4,412 research outputs found
Power-recycled weak-value-based metrology
We improve the precision of the interferometric weak-value-based beam
deflection measurement by introducing a power recycling mirror, creating a
resonant cavity. This results in \emph{all} the light exiting to the detector
with a large deflection, thus eliminating the inefficiency of the rare
postselection. The signal-to-noise ratio of the deflection is itself magnified
by the weak value. We discuss ways to realize this proposal, using a transverse
beam filter and different cavity designs.Comment: 5 pages, 1 figur
The Cardigan Pluton of the Kinsman Quartz Monzonite
Guidebook for field trips in central New Hampshire and contiguous areas: 63rd annual meeting October 2 and 3, 1971 Concord, New Hampshire: Trip A-
Real or Illusory? Case Studies on the Public Perception of Environmental Health Risks in the North West of England
Applied research in a public health setting seeks to provide professionals with insights and knowledge into complex environmental issues to guide actions that reduce inequalities and improve health. We describe ten environmental case studies that explore the public perception of health risk. We employed logical analysis of components of each case study and comparative information to generate new evidence. The findings highlight how concerns about environmental issues measurably affect people’s wellbeing and led to the development of new understanding about the benefits of taking an earlier and more inclusive approach to risk communication that can now be tested further
Radiative capture rates at deep defects from electronic structure calculations
We present a methodology to calculate radiative carrier capture coefficients
at deep defects in semiconductors and insulators from first principles.
Electronic structure and lattice relaxations are accurately described with
hybrid density functional theory. Calculations of capture coefficients provide
an additional validation of the accuracy of these functionals in dealing with
localized defect states. We also discuss the validity of the Condon
approximation, showing that even in the event of large lattice relaxations the
approximation is accurate. We test the method on
GaAs:- and GaN:C, for which
reliable experiments are available, and demonstrate very good agreement with
measured capture coefficients.Comment: 6 pages, 2 figure
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