renormalization for a scalar field in an external scalar potential
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ID: 252309
2018
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Abstract
The Pauli–Villars regularization procedure confirms and sharpens the conclusions reached previously by covariant point splitting. The divergences in the stress tensor of a quantized scalar field interacting with a static scalar potential are isolated into a three-parameter local, covariant functional of the background potential. These divergences can be naturally absorbed into coupling constants of the potential, regarded as a dynamical object in its own right; here, this is demonstrated in detail for two different models of the field-potential coupling. There is a residual dependence on the logarithm of the potential, reminiscent of the renormalization group in fully-interacting quantum field theories; these terms are finite, but numerically dependent on an arbitrary mass or length parameter, which is purely a matter of convention. This work is one step in a program to elucidate boundary divergences by replacing a sharp boundary by a steeply-rising smooth potential.
| Reference Key |
fulling2018symmetryrenormalization
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|---|---|
| Authors | ;Stephen A. Fulling;Thomas E. Settlemyre;Kimball A. Milton |
| Journal | journal of hospitality and tourism management |
| Year | 2018 |
| DOI |
10.3390/sym10030054
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| URL | |
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