scholarly journals Worldsheet factorization for twistor-strings

2014 ◽  
Vol 2014 (4) ◽  
Author(s):  
Tim Adamo
Keyword(s):  
Twistor Strings

Chiral strings, topological branes, and a generalised Weyl-invariance

2019 ◽  
Vol 34 (06n07) ◽  
pp. 1950031 ◽  
Author(s):  
Alex S. Arvanitakis
Keyword(s):  
Field Theory ◽  
Sigma Model ◽  
Space Time ◽  
Symplectic Space ◽  
Topological Field Theory ◽  
Brst Operator ◽  
Weyl Invariance ◽  
Fixed Action ◽  
Twistor Strings ◽  
Topological Field

We introduce a sigma model Lagrangian generalising a number of new and old models which can be thought of as chiral, including the Schild string, ambitwistor strings, and the recently introduced tensionless AdS twistor strings. This “chiral sigma model” describes maps from a [Formula: see text]-brane worldvolume into a symplectic space and is manifestly invariant under diffeomorphisms as well as under a “generalised Weyl invariance” acting on space–time coordinates and worldvolume fields simultaneously. Construction of the Batalin–Vilkovisky master action leads to a BRST operator under which the gauge-fixed action is BRST-exact; we discuss whether this implies that the chiral brane sigma model defines a topological field theory.

Twistor Strings and Supergravity

2007 ◽  
Author(s):  
Mohab Abou-Zeid
Keyword(s):  
Twistor Strings

scholarly journals Twistor-strings, Grassmannians and leading singularities

2010 ◽  
Vol 2010 (3) ◽  
Author(s):  
Mathew Bullimore ◽  
Lionel Mason ◽  
David Skinner
Keyword(s):  
Twistor Strings

scholarly journals Adding flavour to twistor strings

2008 ◽  
Vol 110 (10) ◽  
pp. 102001
Author(s):  
J Bedford ◽  
C Papageorgakis ◽  
K Zoubos
Keyword(s):  
Twistor Strings

Twistor Strings, Gauge Theory and Gravity

2008 ◽  
Author(s):  
Mohab Abou-Zeid ◽  
John Ellis ◽  
Salah Nasri ◽  
Ehab Malkawi
Keyword(s):  
Gauge Theory ◽  
Twistor Strings

scholarly journals Twistor-strings and gravity tree amplitudes

2013 ◽  
Vol 30 (7) ◽  
pp. 075020 ◽  
Author(s):  
Tim Adamo ◽  
Lionel Mason
Keyword(s):  
Twistor Strings

Twistor strings and supergravity

2007 ◽  
Vol 55 (5-7) ◽  
pp. 621-626
Author(s):  
M. Abou-Zeid
Keyword(s):  
Twistor Strings

scholarly journals Twistor theory at fifty: from contour integrals to twistor strings

2017 ◽  
Vol 473 (2206) ◽  
pp. 20170530 ◽  
Author(s):  
Michael Atiyah ◽  
Maciej Dunajski ◽  
Lionel J. Mason
Keyword(s):  
Holomorphic Curves ◽  
Twistor Theory ◽  
Gravitational Instantons ◽  
Yang Mills ◽  
Conformal Curvature ◽  
Twistor Strings ◽  
Equations Of Mathematical Physics ◽  
Elementary Construction ◽  
Dispersionless Systems

We review aspects of twistor theory, its aims and achievements spanning the last five decades. In the twistor approach, space–time is secondary with events being derived objects that correspond to compact holomorphic curves in a complex threefold—the twistor space. After giving an elementary construction of this space, we demonstrate how solutions to linear and nonlinear equations of mathematical physics—anti-self-duality equations on Yang–Mills or conformal curvature—can be encoded into twistor cohomology. These twistor correspondences yield explicit examples of Yang–Mills and gravitational instantons, which we review. They also underlie the twistor approach to integrability: the solitonic systems arise as symmetry reductions of anti-self-dual (ASD) Yang–Mills equations, and Einstein–Weyl dispersionless systems are reductions of ASD conformal equations. We then review the holomorphic string theories in twistor and ambitwistor spaces, and explain how these theories give rise to remarkable new formulae for the computation of quantum scattering amplitudes. Finally, we discuss the Newtonian limit of twistor theory and its possible role in Penrose’s proposal for a role of gravity in quantum collapse of a wave function.

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