Phys. Rev. D 56, 3485–3489 (1997)Total intrinsic spin for plane gravity wavesReceived 2 April 1997; published in the issue dated 15 September 1997 A quantity which measures total intrinsic spin along the z axis is constructed for planar gravity (fields dependent on z and t only), in both the Ashtekar complex connection formalism and in geometrodynamics. The total spin is conserved but (surprisingly) is not a surface term. This constant of the motion coincides with one of four observables previously discovered by Husain and Smolin. Two more of those observables can be interpreted physically as raising and lowering operators for total spin. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.56.3485
DOI:
10.1103/PhysRevD.56.3485
PACS:
04.60.Ds, 04.30.Nk
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