Speaker
Description
Large trapped ion crystals with N > 100 ions provide a versatile platform for quantum simulations.
Penning traps utilize static electric and magnetic fields to confine the ions and enable the
formation of large two-dimensional ion crystals with hundreds of ions. In this talk, I will discuss
recent results of electro-magnetically induced transparency (EIT) cooling that enables near
ground-state cooling of the center-of-mass mode of hundreds of ions, as well as significant
cooling of hundreds of drumhead modes [1]. We will discuss the implementation of EIT cooling,
the observed cooling rates, and how we measure the temperature of large ion crystals. The
experimental results are well described by numerical manybody simulations [2]. Near-ground
state cooling will be used to initialize the axial modes to very low temperatures, thereby greatly
improving the quality of quantum simulation and quantum metrology protocols.
References
[1] E. Jordan et al., Phys. Rev. Lett. 122, 053603 (2019)
[2] A. Shankar et al. Phys. Rev. A 99, 023409 (2019)
