String theory and the real world
نویسنده
چکیده
Figure 1. A world of hidden, small dimensions. String theories are formulated in a world of 10 or 11 spacetime dimensions. According to those theories, a point in what appears to be four-dimensional spacetime is actually a tiny multidimensional space of its own. The purple blowup hints at the complexity of those minuscule spaces; it is a projection onto three dimensions of a 6D space called a Calabi–Yau space after mathematicians Eugenio Calabi and Shing-Tung Yau. (Sunflower photo courtesy of PDPhoto.org; Calabi–Yau drawing by Andrew J. Hanson, Indiana University.)
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تاریخ انتشار 2010