Title of seminar: Observation of entanglement in a cold atom analog of cosmological preheating
Abstract:
Parametric resonance is a universal phenomenon that arises across all scales, from Faraday waves in a water container to particle creation in the early Universe. (Quasi)particles are created in pairs of opposite momenta, and their exponential growth is triggered by fluctuations, such as thermal noise. However, if the initial mean number of (quasi)-particles is zero, vacuum fluctuations initiate the growth, yielding an entangled state. In this seminar, I will report on the experimental parametric creation of opposite-momentum quasi-particles in a Bose-Einstein condensate, and on the evolution of their number and entanglement. This experimental observation is made possible by the introduction of a novel entanglement criterion, to relate number correlation function to entanglement.
There should furthermore be, tomorrow thursday, the next presentation in the series by Peter Schwerdtfeger. Let’s enjoy our summer science camp and come in force to both!