Third sound detectors in accelerated motion
arXiv:2302.12023 · doi:10.1088/1367-2630/ad5758
Abstract
An accelerated observer moving through empty space sees particles appearing and disappearing, while an observer with a constant velocity does not register any particles. This phenomenon, generally known as the Unruh effect, relies on an initial vacuum state, thereby unifying the experience of all inertial observers. We propose an experiment to probe this observer-dependent detector response, using a laser beam in circular motion as a local detector of superfluid helium-4 surface modes or third sound waves. To assess experimental feasibility, we develop a theoretical framework to include a non-zero temperature initial state. We find that an acceleration-dependent signal persists, independent of the initial temperature. By introducing a signal-to-noise measure we show that observing this signal is within experimental reach.
arXiv comment18 pages, 3 figures. v2: Figure 2 axis amended, typos corrected. v3: Added section 4 after referee comments, references added, author order updated, typos corrected
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- Quantum Otto engine driven by quantum fields
- Using nanokelvin quantum thermometry to detect timelike Unruh effect in a Bose-Einstein condensate
- Connecting the circular and drifted Rindler Unruh effects
- Waiting around for Unruh
- Nondestructive optomechanical detection scheme for Bose-Einstein condensates
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- Digital holographic imaging for free surfaces of superfluid helium
- Thermal Fisher information for a rotating BTZ black hole
- Dynamical Maps for Accelerating Detectors