Quantum Gravity Phenomenology , Lorentz Invariance and Discreteness Fay Dowker

  title={Quantum Gravity Phenomenology , Lorentz Invariance and Discreteness Fay Dowker},
  author={Joe Henson and Rafael D. Sorkin},
Contrary to what is often stated, a fundamental spacetime discreteness need not contradict Lorentz invariance. A causal set’s discreteness is in fact locally Lorentz invariant, and we recall the reasons why. For illustration, we introduce a phenomenological model of massive particles propagating in a Minkowski spacetime which arises from an underlying causal set. The particles undergo a Lorentz invariant diffusion in phase space, and we speculate on whether this could have any bearing on the… CONTINUE READING
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