Is life a thermal horizon ?

TL;DR

This paper investigates whether an inertial observer with finite lifetime perceives a thermal horizon, challenging the link between causal horizons and Unruh temperature, using the diamonds temperature concept.

Contribution

It introduces the idea that finite lifetime observers may experience thermal horizons independently of acceleration, extending the algebraic approach to the Unruh effect.

Findings

Finite lifetime affects the perception of thermal horizons.

Causal horizons are not necessarily linked to acceleration.

Diamonds temperature provides a framework for finite lifetime scenarios.

Abstract

This talk aims at questioning the vanishing of Unruh temperature for an inertial observer in Minkovski spacetime with finite lifetime, arguing that in the non eternal case the existence of a causal horizon is not linked to the non-vanishing of the acceleration. This is illustrated by a previous result, the diamonds temperature, that adapts the algebraic approach of Unruh effect to the finite case.