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About quantum fluctuations and holographic principle in (4+n)-dimensional spacetime
In the article we present explicit expressions for quantum fluctuations of
spacetime in the case of -dimensional spacetimes, and consider their
holographic properties and some implications for clocks, black holes and
computation. We also consider quantum fluctuations and their holographic
properties in ADD model and estimate the typical size and mass of the clock to
be used in precise measurements of spacetime fluctuations. Numerical
estimations of phase incoherence of light from extra-galactic sources in ADD
model are also presented.Comment: 5 page
Towards a holographic theory of cosmology -- threads in a tapestry
In this Essay we address several fundamental issues in cosmology: What is the
nature of dark energy and dark matter? Why is the dark sector so different from
ordinary matter? Why is the effective cosmological constant non-zero but so
incredibly small? What is the reason behind the emergence of a critical
acceleration parameter of magnitude in galactic dynamics? We
suggest that the holographic principle is the linchpin in a unified scheme to
understand these various issues.Comment: 8 pages, LaTeX; This Essay, dedicated to the memory of Hendrik van
Dam, received Honorable Mention in the 2013 Essay Competition of the Gravity
Research Foundatio
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