We develop an embedding formalism for $(p,q)$ anti-de Sitter (AdS) superspaces in three dimensions by using a modified version of their supertwistor description given in the literature. A coset construction for these superspaces is worked out. We put forward a program of constructing a supersymmetric analogue of the Bañados metric, which is expected to be a deformation of the $(p,q)$ AdS superspace geometry by a two-dimensional conformal $(p,q)$ supercurrent multiplet.
We propose supertwistor realisations of $(p,q)$ anti-de Sitter (AdS) superspaces in three dimensions and $\cal N$-extended AdS superspaces in four dimensions. For each superspace, we identify a two-point function that is invariant under the corresponding isometry supergroup. This two-point function is a supersymmetric extension (of a function) of the geodesic distance. We also describe a bi-supertwistor formulation for $\cal N$-extended AdS superspace in four dimensions and harmonic/projective extensions of $(p,q)$ AdS superspaces in three dimensions.
In three dimensions, there are two types of ${\cal N}=2$ anti-de Sitter (AdS) supersymmetry, which are denoted (1,1) and (2,0). They are characterised by different supercurrents and support different families of higher-spin gauge models (massless and massive) which were constructed in arXiv:1807.09098 and arXiv:1809.00802 for the (1,1) and (2,0) cases, respectively, using superspace techniques. It turns out that the precise difference between the (1,1) and (2,0) higher-spin supermultiplets can be pinned down by reducing these gauge theories to (1,0) AdS superspace. The present paper is devoted…
The superspace formalism for $\mathcal{N}=1$ supergravity in four dimensions is a powerful geometric setting to engineer off-shell supergravity-matter theories, including higher-derivative couplings. This review provides a unified description of the three superspace approaches to $\mathcal{N}=1$ conformal supergravity: (i) conformal superspace; (ii) $\mathsf{U}(1)$ superspace; and (iii) the Grimm-Wess-Zumino formalism. The prepotential formulation for the latter is discussed. We briefly describe the known off-shell formulations for Poincaré and anti-de Sitter supergravity theories as conformal…
Using the harmonic superspace formalism, we find the metric of a certain 8-dimensional manifold. This manifold is not compact and represents an 8-dimensional generalization of the Taub-NUT manifold. Our conjecture is that the metric that we derived is equivalent to the known metric possessing a discrete $Z_2$ isometry, which may be obtained from the metric describing the dynamics of four BPS monopoles by Hamiltonian reduction.
We study four-point functions of spinning operators in the flavor current multiplet in four dimensional $\mathcal{N}=2$ SCFTs, using superspace techniques. In particular we explicitly construct the differential operators relating the different components of the super-correlator. As a byproduct of our analysis, we report the computation of the four-point amplitudes of gluons in bosonic Yang-Mills theories on $\mathrm{AdS}_5$ and we give evidence of an AdS double copy relation between the gluon amplitude and its gravitational counterpart.
A new description of free massless superfields of arbitrary superspin $Y$ ($Y>1/2$) is proposed. Following the first-order philosophy, we relax some of the properties (reality, gauge redundancy) of the unconstrained higher spin prepotentials and we construct first and half order invariants quantities. These are used to write trivially invariant actions. Additional auxiliary superfields that play the role of spin connections are used to enforce a new local symmetry that restores the degrees of freedom.
研究了玻色子空间的AdS_mxS ^n几何陪集超空间的超共形结构.特别地，我们证明了陪集流形AdS_2 x S^2，AdS_3 x S^3和AdS_5 x S^5的常规超空间扩张不是超共形平坦的，尽管它们的玻色子子流形是共形平坦的，这些超空间扩张是作为相应的D= 4，6，10超引力的解而产生的，并结合AdS/CFT对应得到了广泛的研究.我们给出了一个组理论推理这一事实。我们发现，在AdS_2 × S^2和AdS_3 × S^3情形下，存在不同的基于超群OSp（4^*）的超陪集|2）超共形平坦。我们还证明了在D= 2，3，4，5中存在超共形平坦的“纯”AdS_D超陪集.提出了超共形平坦性的两种检验方法。一种是求解Maurer-Cartan结构方程，另一种是将AdS_m x S^n超空间的等距超群嵌入到（m+n）维Minkowski空间的超共形群中.最后，我们讨论了上述结果在描述超对称动力系统中的一些应用。
The complete AdS(4) x CP(3) superspace for the type IIA superstring and D-branes
我们将IIA型超引力的玻色子AdS_4 × CP^3解提升到D=10的具有32个Grassmann奇方向的超空间中。IIA型超空间是从D=11通过陪集超空间OSp（8）的降维得到的|4）/SO（7）x SO（1，3），将后者实现为前者的Hopf纤维化。这种构造将S^7的Hopf纤维化推广到超空间，作为CP ^3上的U（1）丛，并且适合于写出在AdS_4 x CP ^3超背景中编码IIA型弦和膜动力学的格林-施瓦茨型作用量的显式形式。我们证明了OSp（6| 4）/U（3）x SO（1，3）超陪集弦作用量只描述了完整Green-Schwarz超弦的一个子扇区。因此，即使OSp（6）中的超弦运动方程|4）/U（3）x SO（1，3）子扇区是经典可积的，而全AdS_4 x CP^3超空间不是超陪集的事实要求使用更一般的方法来确定全AdS_4 x CP^3超背景中的超弦是否是经典可积的。
We introduce a first order description of linearized non-minimal ($n=-1$) supergravity in superspace, using the unconstrained prepotential superfield instead of the conventionally constrained super one forms. In this description, after integrating out the connection-like auxiliary superfield of first-order formalism, the superspace action is expressed in terms of a single superfield which combines the prepotential and compensator superfields. We use this description to construct the supersymmetric cubic interaction vertex $3/2-3/2-1/2$ which describes the electromagnetic interaction between tw…
University of Cambridge（剑桥大学）；International Centre for Theoretical Sciences-TIFR（国际理论科学中心-印度理论研究所）；ETH Zürich（苏黎世联邦理工学院）；Weizmann Institute of Science（魏茨曼科学研究所）
Maximally supersymmetric solutions of $R^2$ supergravity
在四维离壳N=1超引力中有五种最大超对称背景，其中两种是众所周知的：Minkowski超空间M^{4|反德西特超空间AdS^{4| 4}。剩下的三个超流形支持不同拓扑的时空，它们是：R x S^3，AdS_3 x R，以及一个与Nappi-Witten群等距的超对称平面波。众所周知，闵可夫斯基和反德西特超空间分别是庞加莱和反德西特超引力理论的解。在这里，我们证明了其他三个超空间是无标度$R^2$超引力的解。我们还提出了一个新的（可能是最简单的）推导的最大超对称背景的离壳N=1超引力。
Starting with the first-order formulation of the massless superparticle model on the $AdS_5\times S^5$ superbackground and presenting the momentum components tangent to $AdS_5$ and $S^5$ subspaces as bilinear combinations of the constrained $SU(2)$-Majorana spinors allows to bring the superparticle's Lagrangian to the form quadratic in supertwistors. The $SU(2,2|4)$ supertwistors are assembled into a pair of $SU(2)$ doublets, one of which has even $SU(2,2)$ and odd $SU(4)$ components, while the other has odd $SU(2,2)$ and even $SU(4)$ components. They are subject to the first-class constraints…
