Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1998-08-27
Mod.Phys.Lett. A13 (1998) 2475-2478
Physics
High Energy Physics
High Energy Physics - Theory
This is a paper submitted to the Gravity Research Foundation Essay Competition of 1998 that received Honorable Mention
Scientific paper
10.1142/S0217732398002631
An outline is given of a recently discovered technique for building a quantum effective action that is completely independent of gauge-fixing choices and ghost determinants. One makes maximum use of the geometry and fibre-bundle structure of the space of field histories and introduces a set of nonlocal composite fields: the geodesic normal fields based on Vilkovisky's connection on the space of histories. The closed-time-path formalism of Schwinger, Bakshi, Mahantappa {\it et al} can be adapted for these fields, and a set of gauge-fixing-independent dynamical equations for their expectation values (starting from given initial conditions) can be computed. An obvious application for such equations is to the study of the formation and radiative decay of black holes, and to other back-reaction problems.
DeWitt Bryce
Molina--Paris Carmen
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