Found 5 result(s)

### 10.11.2016 (Thursday)

#### Twistors and Conformal Higher-Spin Theory

Regular Seminar Tristan McLoughlin (Trinity College Dublin)

 at: 14:00 QMWroom G.O. Jones 610 abstract: Higher-spin fields can play an important role in effective field theories and increasingly are of interest due to their appearance in recent studies of holography. Understanding their interactions is however often involved and searching for alternative formulations could be very useful. In this talk we will consider one such formulation, namely twistors. After giving a general introduction to the use of twistors in describing the dynamics of massless field theories, we will focus on the construction of off-shell actions directly in twistor space including a recent higher-spin generalisation of self-dual Weyl gravity. We will show how this formulation produces the expected flat space-time spectrum and linearised symmetries. In analogy with the known embedding of Einstein gravity inside Weyl gravity, we identify a ghost free sub-sector of the conformal higher-spin theory and consider its cubic couplings. Finally we describe proposed anti-self-dual interaction terms to extend the twistor action to the full conformal higher-spin theory.

### 01.12.2011 (Thursday)

#### Holographic three-point functions

Regular Seminar Tristan McLoughlin (AEI)

 at: 12:00 ICroom H503 abstract:

### 30.03.2011 (Wednesday)

#### Three-point functions in AdS/CFT and functional light-cone methods

Regular Seminar Tristan McLoughlin (AEI)

 at: 13:15 KCLroom 423 abstract: In this talk we will briefly review the recent progress in the semiclassical string theory calculation of non-BPS gauge theory three-point correlation functions at strong coupling. We will then discuss the light-cone path integral approach to such three-point functions with a focus on near-BMN operators where one can systematically go beyond the semiclassical approximation.

### 15.12.2010 (Wednesday)

#### Toward All-loop Scattering Amplitudes in N=4 SY

Triangular Seminar Tristan A. McLoughlin (MPI)

 at: 17:00 ICroom Lecture Theatre 3 Blackett abstract:

### 03.12.2008 (Wednesday)

#### Quantum Strings in AdS4 x P3

Regular Seminar Tristan McLoughlin (Max Planck Institute)

 at: 14:00 ICroom H503 abstract: There has been much recent interest in the proposed duality between superstrings in the curved geometry AdS_4 x P3 and three dimensional N=6 supersymmetric Chern-Simons theory -- a new, concrete, example of the holographic AdS/CFT correspondence. This dual pair has additionally been conjectured to be an integrable system in the planar limit. In this talk I will discuss several classes of classical strings moving in this background, and their quantum corrections, as tools to probe the duality and to test the conjectured integrable structure.