Speaker: Tobias Haas (Centre for Quantum Information and Communication, Université libre de Bruxelles)
Title of Talk: Area laws from classical entropies
Abstract: The scaling of local quantum entropies is of utmost interest for characterizing quantum fields, many-body systems and gravity. Despite their importance, being nonlinear functionals of the underlying quantum state often hinders their theoretical as well as experimental accessibility. Here, we show that suitably chosen classical entropies of standard measurement distributions capture the very same features as their quantum analogs. We demonstrate the presence of the celebrated area law for classical entropies for typical states such as ground and excited states of a scalar quantum field. Further, we consider the post-quench dynamics of a multi-well spin-1 Bose-Einstein condensate from an initial product state, in which case we observe the dynamical build-up of quantum correlations signaled by the area law, as well as local thermalization revealed by a transition to a volume law, both in regimes characterized by non-Gaussian quantum states and small sample numbers.

Venue (HYBRID-EVENT): Goldene Box, Physikalisches Institut, INF 226, 69120 Heidelberg AND all talks will also be streamed via the permanent Zoom-link:

https://zoom.us/j/94602401603?pwd=SVRYMHQxaWJrUGtFWXRWdkFaKzJVUT09
Meeting ID: 946 0240 1603
Passcode: 386993

Schedule:
13:30-14:00 talk+questions
14:00-14.15 discussion and questions
14.15-14:30 pizza

 

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The aim of the YRC Lunch Seminar is to promote individual research done by young researchers within Isoquant and create a regular platform to socialize and share ideas.