Speaker
Description
Crystals of cold trapped ions are a promising platform for quantum technology and for studying the quantum many-body problem as a well-controlled toy many-body system. In modern state-of-the-art experiments, managing the entropy of large Coulomb crystals becomes challenging due to the exponential scaling of the Hilbert space with the number of trapped ions. In particular, as we demonstrate, collective effects must be taken into account and play an important role in both motional temperature measurement and the cooling process. Regarding the latter, the possible influence of collective effects has been debated in the literature in recent years. In my talk, I will present a thermometry protocol for large ion crystals that accounts for the emerging collective dynamics [1] and describe a mechanism that enhances the cooling of collective modes as more ions are added to the crystal.
[1] I.Vybornyi et. al, PRX Quantum 4, 040346 (2023)
