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Complex Classical Fields: A Framework for Reflection Positivity

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Abstract

We explore a framework for complex classical fields, appropriate for describing quantum field theories. Our fields are linear transformations on a Hilbert space, so they are more general than random variables for a probability measure. Our method generalizes Osterwalder and Schrader’s construction of Euclidean fields. We allow complex-valued classical fields in the case of quantum field theories that describe neutral particles.

From an analytic point-of-view, the key to using our method is reflection positivity. We investigate conditions on the Fourier representation of the fields to ensure that reflection positivity holds. We also show how reflection positivity is preserved by various spacetime compactifications of \({\mathbb{R}^{d}}\) in different coordinate directions.

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Authors and Affiliations

  1. Harvard University, Cambridge, MA, 02138, USA

    Arthur Jaffe & Roberto E. Martinez II

  2. School of Mathematics, Cardiff University, Wales, UK

    Christian D. Jäkel

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  1. Arthur Jaffe
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  2. Christian D. Jäkel
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  3. Roberto E. Martinez II
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Correspondence to Arthur Jaffe.

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Communicated by Y. Kawahigashi

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Jaffe, A., Jäkel, C.D. & Martinez, R.E. Complex Classical Fields: A Framework for Reflection Positivity. Commun. Math. Phys. 329, 1–28 (2014). https://doi.org/10.1007/s00220-014-2040-y

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  • DOI: https://doi.org/10.1007/s00220-014-2040-y

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