A photon echo experiment in Tm(3+):YAG is reported that shows, for the first time to the authors' knowledge, the time-domain equivalent of the transition from near- to far-field diffraction, including Talbot self-imaging effects. The experiment demonstrates the huge dispersion capability of photon echoes and opens the way to further exploration of space-time duality.
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Explanation for the Absence of Secondary Peaks in Black Hole Light Curve Autocorrelations.
Phys Rev Lett
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Department of Physics & Astronomy, Vanderbilt University, Nashville, Tennessee 37212, USA.
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- The radiation observed from gas falling into a black hole is influenced by the flow details and the black hole's spacetime geometry, resulting in specific light patterns.
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