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    <title><string language="fre"><![CDATA[MEASUREMENT OF THE THERMAL SPECTRUM OF HAWKING RADIATION FROM AN ANALOG HORIZON]]></string></title>
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        <string language="fre"><![CDATA[Hawking predicted that black holes should radiate 
thermal radiation, the temperature being a function solely of the 
geometry near the horizon of the black hole. The same arguments show 
that one would also expect thermal radiation from other horizons, like 
the sonic horizon formed in a trans-sonic flow, or the horizon to fluid 
surface gravity waves formed by a blocking flow.

This talk will discuss the phenomenon of black hole thermal 
emission, problems with its derivation, the ubiquity of such thermal 
emission by horizons, and the measurements made in the past year of the 
thermal spectrum of such radiation from a horizon for surface water 
waves in a flume.]]></string></description>
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NOTE:William G. Unruh (born August 28, 1945) is a Canadian physicist at the University of British Columbia, Vancouver, who described the hypothetical Unruh effect in 1976. Unruh was born in Winnipeg, Manitoba. He obtained his B.Sc. from the University of Manitoba in 1967, followed by an M.A. (1969) and Ph.D. (1971) from Princeton University, New Jersey, under the direction of John Archibald Wheeler. Unruh has made seminal contributions to our understanding of gravity, black holes, cosmology, and quantum fields in curved spaces, including the discovery of what is now known as the Unruh effect. Unruh has contributed to the foundations of quantum mechanics in areas such as decoherence and the question of time in quantum mechanics. He has helped to clarify the meaning of nonlocality in a quantum context, in particular that quantum nonlocality does not follow from Bell's theorem and that ultimately quantum mechanics is a local theory. Unruh is also one of the main critics of the Afshar experiment.     Source: Wikipedia (https://en.wikipedia.org/wiki/W._G._Unruh) 
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            <date><dateTime>2011-06-14</dateTime></date>
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NOTE:Responsable communication à l'Institut d'Astrophysique de Paris  
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            <date><dateTime>2011-06-14</dateTime></date>
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