NUMBER OF DEGREES OF FREEDOM, DENSITY OF STATES AND TACHYONS IN STRING THEORY AND CFT

被引：176

作者：

KUTASOV, D ^{[1
]}

SEIBERG, N ^{[1
]}

机构：

[1] RUTGERS STATE UNIV,DEPT PHYS & ASTRON,PISCATAWAY,NJ 08855

来源：

NUCLEAR PHYSICS B | 1991年 / 358卷 / 03期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0550-3213(91)90426-X

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We analyze the asymptotic density of states in two-dimensional conformal field theories as a measure of their number of degrees of freedom. In theories where some of the states contribute - 1 to the torus amplitude - "space-time fermions" - it is natural to study the asymptotic behavior of the number of bosons minus fermions. This quantity is relevant when the (CFT is coupled to two-dimensional gravity. The combined gravity and matter theory is stable only when the asymptotic density of states of the world-sheet theory (space-time bosons minus fermions) is that of a quantum mechanical system of one free degree of freedom i.e. one with no net field theoretic degrees of freedom. From a space-time point of view, the asymptotic density of states of the bosons and the fermions can be exponentially large but the difference between them is that of a two-dimensional field theory.

引用

页码：600 / 618

页数：19

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