Strings in Time-Dependent Orbifolds
نویسندگان
چکیده
منابع مشابه
Strings in Time-Dependent Orbifolds
We continue and extend our earlier investigation " Strings in a Time-Dependent Orbifold " (hep-th/0204168). We formulate conditions for an orbifold to be amenable to perturba-tive string analysis and classify the low dimensional orbifolds satisfying these conditions. We analyze the tree and torus amplitudes of some of these orbifolds. The tree amplitudes exhibit a new kind of infrared divergenc...
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The most thoroughly understood example of superstring compactification is compactification on a fiat torus [1]. This example is exactly soluble and obeys all of the equations of string theory. It is also clearly a significant example since it is one way to understand the construction of the heterotic string theory [2]. For compact~ficatlon of physical dimensions from ten to four, the fiat torus...
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How can these symmetries be broken to SU(3) x SU(2) x U(1) in four dimensions? One powerful approach to string symmetry breaking was proposed in a beautiful paper by Candelas, Horowitz, Strominger and Witten [l]. This group advocated compactifying the heterotic string on M4 x K, where M4 is four-dimensional Minkowski space, and K is a compact six-dimensional manifdld of SU(31 holonomv. a so-cal...
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In these lectures, we review the physics of time–dependent orbifolds of string theory, with particular attention to orbifolds of three–dimensional Minkowski space. We discuss the propagation of free particles in the orbifold geometries, together with their interactions. We address the issue of stability of these string vacua and the difficulties in defining a consistent perturbation theory, poi...
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2002
ISSN: 1029-8479
DOI: 10.1088/1126-6708/2002/10/031