منابع مشابه
Black holes admitting a Freudenthal dual
The quantised charges x of four dimensional stringy black holes may be assigned to elements of an integral Freudenthal triple system whose automorphism group is the corresponding U-duality and whose U-invariant quartic norm ∆(x) determines the lowest order entropy. Here we introduce a Freudenthal duality x→ x̃, for which ̃̃ x = −x. Although distinct from U-duality it nevertheless leaves ∆(x) inva...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2009
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.80.026003