Inverse Temperature 4-vector in Special Relativity

Abstract

There exist several prescriptions for identifying the notion of temperature in special relativity. We argue that the inverse temperature 4-vector $\beta$ is the only viable option from the laws of thermodynamics, and $\beta$ is a future-directed timelike 4-vector. Using a superfluidity thought experiment, one can show that $\beta$ is not necessarily along the time direction of the comoving frame of the system, as is usually thought. It is conjectured that, for an isolated system, the 4-vector is determined from the entropy-maximum principle.

11 pages, revised version

References in corpus (3)

• Thermal equilibrium and statistical thermometers in special relativity
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• On the Question of Temperature Transformations under Lorentz and Galilei Boosts