Göttingen 2025 – scientific programme

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MP: Fachverband Theoretische und Mathematische Grundlagen der Physik

MP 11: Quantum Field Theory II

MP 11.1: Talk

Thursday, April 3, 2025, 16:15–16:35, ZHG001

Implementing a Causal Measurement Scheme for Quantum Fields — •Jan Michael Mandrysch — Institut für Quantenoptik und Quanteninformation, Wien, Österreich

While measurement processes in standard quantum mechanics are well understood, the extension of these ideas to quantum field theory (QFT) remains a key challenge. In particular, ensuring that measurements respect fundamental principles such as relativistic causality is crucial. A persistent issue concerning measurements in QFT is, though, that microcausality alone is insufficient to prevent superluminal signaling. In this talk, I will present a concrete scheme for measuring real linear scalar fields, grounded in the Fewster-Verch measurement framework. This approach fully respects the principles of relativistic covariance, locality, and causality, offering a robust solution to the challenges of measurement in QFT.

Keywords: Quantum Measurement Theory; Measurement Scheme; Causality; Foundational Physics; Gaussian Measurements