The Indispensability of Ghost Fields in the Light-Cone Gauge Quantization of Gauge Fields
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概要
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We continue McCartor and Robertson's recent demonstration of the indispensability of ghost fields in the light-cone gauge quantization of gauge fields. It is shown that the ghost fields are indispensable in deriving well-defined antiderivatives and in regularizing the most singular component of the gauge field propagator. To this end it is sufficient to confine ourselves to noninteracting abelian fields. Furthermore, to circumvent dealing with constrained systems, we construct the temporal gauge canonical formulation of the free electromagnetic field in auxiliary coordinates x^μ=(x^-,x^+,x^1,x^2), where x^-=x^0cosθ-x^3sinθ,x^+=x^0sinθ+x^3cosθ and x^- plays the role of time. In so doing we can quantize the fields canonically without any constraints, unambiguously introduce "static ghost fields" as residual gauge degrees of freedom and construct the light-cone gauge solution in the light-cone representation by simply taking the light-cone limit (θ→π/4). As a by product we find that, with a suitable choice of vacuum, the Mandelstam-Leibbrandt form of the propagator can be derived in the θ=0 case (the temporal gauge formulation in the equal-time representation).
- 理論物理学刊行会の論文
- 1999-07-25
著者
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Mccartor Gary
Department Of Physics Southern Methodist University
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Nakawaki Y
Setsunan Univ. Osaka Jpn
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Nakawaki Yuji
Division Of Mathematics And Physics Department Of Engineering Setsunan University
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