Round 19: Tossup 9

This object is used to derive an “irrelevant” deformation of two-dimensional QFTs whose generalizations to conserved holomorphic U(1) (“U-one”) currents include the JT-bar and TJ-bar deformations. The fact that this object’s expectation diverges on the Cauchy horizon results in the chronology protection conjecture. Because this object has zero divergence, some derivations add a “pseudo”-object named for Landau and Lifshitz. This object is traceless in conformal (10[1])field theories. (10[1])For a collection (-5[1])of particles all at rest, (10[2])only this object’s time–time component is nonzero. (-5[1])The ten (-5[1])independent components of this object (10[1])are the conserved (-5[1])Noether currents of translations. (-5[1])This object is multiplied (10[1])by “8 pi big G (10[2]-5[1])over c to the fourth” (10[2])in the Einstein field equations. (-5[3])For 10 points, (10[1])name this 4-by-4 tensor in general relativity (-5[1])named for two quantities. ■END■ (10[6]0[7])

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