The Unruh Effect in Slow Motion
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  • Release Date: 2021-12-14
  • Unruh effect
  • experimental proposal
  • Collision Models
  • Gaussian quantum mechanics
  • non-perturbative calculation
Video Introduction

This video is adapted from 10.3390/sym13111977

Is the quantum vacuum (the "zero particle" state) really empty? Is there an observer-independent notion of particle number? Surprisingly there is not! What feels to one observer like empty space may feel to another observer like a thermal bath of particles. The difference-maker is acceleration; accelerated observers in the vacuum will feel a non-zero temperature. This is known as the Unruh effect and is one of the fundamental and yet still untested predictions of quantum field theory. In this video, I will introduce the Unruh effect and overview a new experimental setup that may be able to detect it.

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Grimmer, D.; Vriend, S.; Grimmer, D.; Martin-Martinez, E. The Unruh Effect in Slow Motion. Encyclopedia. Available online: (accessed on 15 April 2024).
Grimmer D, Vriend S, Grimmer D, Martin-Martinez E. The Unruh Effect in Slow Motion. Encyclopedia. Available at: Accessed April 15, 2024.
Grimmer, Daniel, Silas Vriend, Daniel Grimmer, Eduardo Martin-Martinez. "The Unruh Effect in Slow Motion" Encyclopedia, (accessed April 15, 2024).
Grimmer, D., Vriend, S., Grimmer, D., & Martin-Martinez, E. (2021, December 14). The Unruh Effect in Slow Motion. In Encyclopedia.
Grimmer, Daniel, et al. "The Unruh Effect in Slow Motion." Encyclopedia. Web. 14 December, 2021.