11,067 research outputs found
Reply to the Comment on Perfect imaging with positive refraction in three dimensions
Exact time-dependent solutions of Maxwell's equations in Maxwell's fish eye
show that perfect imaging is not an artifact of a drain at the image, although
a drain is required for subwavelength resolution
Space-time geometry of quantum dielectrics
Light experiences dielectric matter as an effective gravitational field and
matter experiences light as a form of gravity as well. Light and matter waves
see each other as dual space-time metrics, thus establishing a unique model in
field theory. Actio et reactio are governed by Abraham's energy-momentum tensor
and equations of state for quantum dielectrics
The Future of “Fair and Balanced”: The Fairness Doctrine, Net Neutrality, and the Internet
In recent months, different groups--pundits, politicians, and even an FCC Commissioner--have discussed resurrecting the now-defunct Fairness Doctrine and applying it to Internet communication. This iBrief responds to the novel application of the Doctrine to the Internet in three parts. First, this iBrief will review the history and legal rationale that supported the Fairness Doctrine, with a particular emphasis on emerging technologies. Second, this iBrief applies these legal arguments to the evolving structure of the Internet. Third, this iBrief will consider what we can learn about Net Neutrality through an analogy to the Fairness Doctrine. This iBrief concludes that, while the Fairness Doctrine is not appropriate to use on the Internet in its present form, the arguments for the Doctrine could affect the debate surrounding Net Neutrality, depending on how the Obama Administration implements Net Neutrality
Lifting a Conformal Field Theory from D-Dimensional Flat Space to (D+1)-Dimensional Ads Space
A quantum field theory on Anti-de-Sitter space can be constructed from a
conformal field theory on its boundary Minkowski space by an inversion of the
holographic mapping. To do this the conformal field theory must satisfy certain
constraints. The structure of operator product expansions is carried over to
AdS space. We show that this method yields a higher spin field theory HS(4)
from the minimal conformal O(N) sigma model in three dimensions. For these
models AdS/CFT correspondence is hereby proved to second order in the coupling
constant.Comment: Latex file, 19 pages; one section added, 3 references added, typos
correcte
Perfect imaging: they don't do it with mirrors
Imaging with a spherical mirror in empty space is compared with the case when
the mirror is filled with the medium of Maxwell's fish eye. Exact
time-dependent solutions of Maxwell's equations show that perfect imaging is
not achievable with an electrical ideal mirror on its own, but with Maxwell's
fish eye in the regime when it implements a curved geometry for full
electromagnetic waves
Case Study: \u3cem\u3eWebster v. Susquehanna Pole Line Company of Harford County\u3c/em\u3e (1910)
At the turn of the 20th century, the State of Maryland witnessed an increase in the demand for hydroelectricity. Several public utility companies raced to construct a hydroelectric facility on the Susquehanna River, by which they could distribute electricity to Baltimore, Harrisburg, Philadelphia, and Wilmington. This case study examines the use of eminent domain by one such company, the Susquehanna Pole Line Company of Harford County, for the purpose of erecting a continuous transmission line, originating at McCall’s Ferry Dam, the first hydroelectric facility built on the Susquehanna River. This project was subsequently challenged by Harford County residents, whose property the company sought to condemn
Superantenna made of transformation media
We show how transformation media can make a superantenna that is either
completely invisible or focuses incoming light into a needle-sharp beam. Our
idea is based on representating three-dimensional space as a foliage of sheets
and performing two-dimensional conformal maps on each shee
Reply on the ``Comment on `Loss-error compensation in quantum- state measurements' ''
The authors of the Comment [G. M. D'Ariano and C. Macchiavello to be
published in Phys. Rev. A, quant-ph/9701009] tried to reestablish a 0.5
efficiency bound for loss compensation in optical homodyne tomography. In our
reply we demonstrate that neither does such a rigorous bound exist nor is the
bound required for ruling out the state reconstruction of an individual system
[G. M. D'Ariano and H. P. Yuen, Phys. Rev. Lett. 76, 2832 (1996)].Comment: LaTex, 2 pages, 1 Figure; to be published in Physical Review
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