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Universal string and small N = 4 superstring
1995
Physics Letters B
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It was previously shown that most of the superstrings can be obtained from those with higher world-sheet supersymmetry as spontaneously broken phases. In this paper, we show that the small N=4 superstring, which was left out of this hierarchy of the universal string, can be obtained from the large N=4 strings. We also show that the N=2 string is a special vacuum of small N=4 string. Thus all the known superstring theories can be derived from a universal string by spontaneous breakdown of supersymmetry.
doi:10.1016/0370-2693(95)00738-7
fatcat:2p5o4qwi6fcjti2j5nzivthbmu