Group Seminar via Zoom: Programmable Interactions for Entanglement Generation Between Atomic Ensembles

Philipp Kunkel, Stanford University, Stanford
Group meeting via video conference (Zoom)
Tuesday, March 22nd, 9:00 (MEZ)

Due to the Covid-19 pandemic, the group seminar will be a hybrid event, allowing participants to attend the seminar virtually and
in-person. This procedure enables us to continue our research, enhance discussions and exchange important information.

Abstract:

Interactions form the basis for the experimental generation of entanglement between quantum objects. Typical quantum simulation platforms such as atomic systems or trapped ions feature local interactions which decay as a function of distance. The spatial entanglement structure that can be generated is thus inherently connected to the physical geometry of the system. In this talk, I will present the recent results of our experiment where we use an optical cavity to mediate programmable long-range interactions between a 1D array of atomic ensembles. Driving the cavity with light induces an all-to-all interaction between the spin-1 atoms creating highly correlated atom pairs. In this case, we verify the generation of entanglement via the observation of spin-nematic squeezing. By tailoring the frequency spectrum of the drive field, we achieve arbitrary control over the distance dependence of the interactions as well as their relative sign. This allows us to implement dynamics in various effective geometries which are entirely distinct from the physical arrangement of the atoms, including frustrated 2D lattices and an emergent tree-like geometry inspired by holographic models of quantum gravity. In the realm of quantum information, these new capabilities pave the way towards engineering quantum states with specific spatial entanglement structure for quantum sensing and quantum computation.

If you would like to join our group seminar via Zoom, please contact us for more information.