Multi-Time Equations, Classical and Quantum

TL;DR

This paper compares multi-time evolution equations in classical and quantum physics, discussing their role in achieving Lorentz invariance and analyzing their theoretical significance.

Contribution

It provides a comparative analysis of multi-time equations in classical and quantum contexts, highlighting their conceptual and theoretical differences.

Findings

Multi-time equations aim to make theories Lorentz invariant.

Their significance varies between classical and quantum physics.

The paper clarifies the theoretical status of multi-time equations.

Abstract

Multi-time equations are evolution equations involving several time variables, one for each particle. Such equations have been considered for the purpose of making theories manifestly Lorentz invariant. We compare their status and significance in classical and quantum physics.