Phys. Rev. D 40, 1876–1885 (1989)Observer-dependent quantum vacua in curved space. IIReceived 12 May 1987; revised 30 May 1989; published in the issue dated 15 September 1989 An observer-dependent Hamiltonian is introduced in order to describe massless spin-1 particles in curved space-times. The vacuum state is defined by means of Hamiltonian diagonalization and minimization, which turns out to be equivalent criteria. This method works in an arbitrary geometry, although a condition on the fluid of observers is required. Computations give the vacua commonly accepted in the literature. © 1989 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.40.1876
DOI:
10.1103/PhysRevD.40.1876
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