23 citations · 129 across the 18 of their papers we have counts for
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Gauged twistor spinors and symmetry operators
Ümit Ertem
We consider gauged twistor spinors which are supersymmetry generators of supersymmetric and superconformal field theories in curved backgrounds. We show that the spinor bilinears o…
Quasinormal modes of BTZ black hole and Hawking-like radiation in graphene
B. S. Kandemir, Ümit Ertem
The Bañados-Teitelboim-Zanelli (BTZ) black hole model corresponds to a solution of (2+1)-dimensional Einstein gravity with negative cosmological constant, and by a conformal rescal…
Twistor spinors and extended conformal superalgebras
Ümit Ertem
We show that the first-order symmetry operators of twistor spinors can be constructed from conformal Killing-Yano forms in conformally-flat backgrounds. We express the conditions o…
Supergravity backgrounds and symmetry superalgebras
Ümit Ertem
We consider the bosonic sectors of supergravity theories in ten and eleven dimensions which correspond to the low energy limits of string theories and M-theory. The solutions of su…
Symmetry operators of Killing spinors and superalgebras in AdS_5
Ümit Ertem
We construct the first-order symmetry operators of Killing spinor equation in terms of odd Killing-Yano forms. By modifying the Schouten-Nijenhuis bracket of Killing-Yano forms, we…
Hidden symmetries and Lie algebra structures from geometric and supergravity Killing spinors
Özgür Açık, Ümit Ertem
We consider geometric and supergravity Killing spinors and the spinor bilinears constructed out of them. The spinor bilinears of geometric Killing spinors correspond to the antisym…