Speaker
Description
In the ongoing work towards observing the circular motion Unruh effect in (2+1)-dimensional analogue spacetime systems, one challenge is that the effective temperature experienced by a local detector is much smaller than the linear acceleration prediction when the detector's energy gap is small and the interaction time is long. We show that an effective temperature of the order of the linear acceleration prediction can be regained via a controlled long-time-small-gap double limit, provided the detector's coupling to the field is allowed to change sign. Such sign changes may be naturally implementable in experiments where a laser beam plays the role of the detector. We further provide a new mathematical characterisation of the long interaction time limit, with a precise asymptotic control of both the coupling strength and its Fourier transform. (Based on joint work with Christopher J Fewster, Leo J A Parry and Diego Vidal-Cruzprieto.)
