Abstract.
Twistors are re-interpreted in terms of geometric algebra as 4-d spinors with a position dependence. This allows us to construct their properties as observables of a quantum system. The Robinson congruence is derived and extended to non-Euclidean spaces where it is represented in terms of d-lines. Different conformal spaces are constructed through the infinity twistors for Friedmann-Robertson-Walker spaces. Finally, we give a 6-d spinor representation of a twistor, which allows us to define the geometrical properties of the twistors as observables of this higher dimensional space.
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Accepted: August 2006.
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Arcaute, E., Lasenby, A. & Doran, C. Twistors in Geometric Algebra. AACA 18, 373–394 (2008). https://doi.org/10.1007/s00006-008-0083-x
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DOI: https://doi.org/10.1007/s00006-008-0083-x