arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0903.5517hep-thgr-qcmath.RA
收藏

接纳Freudenthal对偶的黑洞

Black holes admitting a Freudenthal dual

L. Borsten, D. Dahanayake, M. J. Duff, W. Rubens

摘要:

四维弦黑洞的量子化电荷x可以归属于积分Freudenthal三元系的元素,该三元系的自同构群是相应的U-对偶,其U-不变四次范数Delta(x)决定最低阶熵。这里我们引入一个Freudenthal对偶x -> \tilde{x},其中\tilde{\tilde{x}} =-x。虽然与U-对偶不同,但它仍然保持Delta(x)不变。然而,\tilde{x}必须是整数的要求将我们限制在Delta(x)必须是完美平方的黑洞子集上。高阶修正的问题仍然是开放的,因为一些但不是所有的离散U-对偶不变量是Freudenthal不变量。类似地,五维黑洞和弦的量子化电荷A可以被分配给整约当代数的元素,其立方范数N(A)确定最低阶熵。我们引入了一个类似的Jordan对偶A*,其中N(A)必然是一个完美立方体,对于它A**=A,使得N(A)不变。这两个二元性通过4D/5D升降机相关联。

英文摘要:

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 Delta(x) determines the lowest order entropy. Here we introduce a Freudenthal duality x -> \tilde{x}, for which \tilde{\tilde{x}}=-x. Although distinct from U-duality it nevertheless leaves Delta(x) invariant. However, the requirement that \tilde{x} be integer restricts us to the subset of black holes for which Delta(x) is necessarily a perfect square. The issue of higher-order corrections remains open as some, but not all, of the discrete U-duality invariants are Freudenthal invariant. Similarly, the quantised charges A of five dimensional black holes and strings may be assigned to elements of an integral Jordan algebra, whose cubic norm N(A) determines the lowest order entropy. We introduce an analogous Jordan dual A*, with N(A) necessarily a perfect cube, for which A**=A and which leaves N(A) invariant. The two dualities are related by a 4D/5D lift.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑