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arXiv 1209.0233hep-thmath-phmath.MP
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D(2,1;λ)的极小酉表示及其SU(2)变形和d=1,N=4超共形模型

Minimal unitary representation of D(2,1;λ) and its SU(2) deformations and d=1, N=4 superconformal models

Karan Govil, Murat Gunaydin

摘要:

非紧群和超群的几何拟共形实现的量子化直接导致它们的极小酉表示(minreps)。用拟共形方法研究超共形群SU(2,2)的无质量酉超多重态|N)和OSp(8*| 2n)分别构造为minrep及其U(1)和SU(2)变形。本文将这些结果推广到一维N=4超共形代数D(2,1;λ)的极小表示的SU(2)变形。我们发现SU(2)形变可以同时用n对玻色子和m对费米子来实现。D(2,1;λ)的变形极小表示的生成元与对偶超代数OSp(2n*)的生成元可交换|2 m)的粒子,这些玻色子和费米子。我们证明了最近研究的调和超空间中N=4超共形模型的对称生成元与D(2,1;λ)的极小酉超多重态之间存在精确的映射.这可以被理解为量子力学四元数凯勒西格玛模型的光谱与其等距群的minreps之间的一般映射的特殊情况,该映射源于耦合到超引力的4d,N=2西格玛模型与其等距群的minreps之间建立的精确映射。

英文摘要:

Quantization of the geometric quasiconformal realizations of noncompact groups and supergroups leads directly to their minimal unitary representations (minreps). Using quasiconformal methods massless unitary supermultiplets of superconformal groups SU(2,2|N) and OSp(8*|2n) in four and six dimensions were constructed as minreps and their U(1) and SU(2) deformations, respectively. In this paper we extend these results to SU(2) deformations of the minrep of N=4 superconformal algebra D(2,1;λ) in one dimension. We find that SU(2) deformations can be achieved using n pairs of bosons and m pairs of fermions simultaneously. The generators of deformed minimal representations of D(2,1;λ) commute with the generators of a dual superalgebra OSp(2n*|2m) realized in terms of these bosons and fermions. We show that there exists a precise mapping between symmetry generators of N=4 superconformal models in harmonic superspace studied recently and minimal unitary supermultiplets of D(2,1;λ) deformed by a pair of bosons. This can be understood as a particular case of a general mapping between the spectra of quantum mechanical quaternionic Kähler sigma models with eight super symmetries and minreps of their isometry groups that descends from the precise mapping established between the 4d, N=2 sigma models coupled to supergravity and minreps of their isometry groups.

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