Phenomenological constraints on "impossible" measurements

2025/07/09 by Huhtala, Jesse, Vilja, Iiro
#FOS: Physical sciences #Quantum Physics (quant-ph)

paper · doi:10.48550/arxiv.2507.06767

Abstract

In this Letter, we analyze an "impossible" measurement scenario presented by Sorkin. This scenario involving a joint measurement on spacelike separated systems in an intermediary region has widely been discussed in the quantum field theory measurement literature. We analyze the non-relativistic version of this paradoxical measurement scenario and consider which phenomenological constraints must be introduced from relativistic theory to remove the faster-than-light signaling.

Citations

• State updates and useful qubits in relativistic quantum information
• Lectures on measurement in quantum field theory
• Eliminating the "impossible": Recent progress on local measurement theory for quantum field theory
• Quantum fields and local measurements
• Formal Description of Measurements in Local Quantum Field Theory

Related

• Eliminating the "impossible": Recent progress on local measurement theory for quantum field theory
• Measurement in Quantum Field Theory
• Lectures on measurement in quantum field theory
• The Pragmatic QFT Measurement Problem and the need for a Heisenberg-like Cut in QFT
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