6 citations · 14 across the 9 of their papers we have counts for
9 papers
Spinor bilinears and Killing-Yano forms in generalized geometry
Özgür Açık, Ümit Ertem, Özgür Kelekçi
Spinor bilinears of generalized spinors and their properties are investigated. Generalized Killing and twistor spinor equations are considered and their relations to the equations…
Massless spin-2 fields via lower spins
Özgür Açık, Ümit Ertem
Solutions of massless spin-2 field equations are written in terms of massless spin- Rarita-Schwinger fields and twistor spinors. It is shown that the proposed massless…
Weyl semimetals and spin cobordism
Ümit Ertem
Classification of topological insulators and superconductors is manifested in terms of spin cobordism groups for lower dimensions. It is discussed that the periodic table of topolo…
Choices of spinor inner products on M-theory backgrounds
Ümit Ertem, Özgün Sütemen, Özgür Açık +1
M-theory backgrounds in the form of unwarped compactifications with or without fluxes are considered. We construct the bilinear forms of supergravity Killing spinors for different…
Spin Geometry and Some Applications
Ümit Ertem
In this review, basic definitions of spin geometry are given and some of its applications to supersymmetry, supergravity and condensed matter physics are summarized. Clifford algeb…
Extended superalgebras from twistor and Killing spinors
Ümit Ertem
The basic first-order differential operators of spin geometry that are Dirac operator and twistor operator are considered. Special types of spinors defined from these operators suc…