The Trapped Ion Quantum Technology group at Stockholm University invites applications for two postdoctoral positions on our trapped Rydberg ion experiments. The first position is to work on a room-temperature experimental setup to investigate Rydberg physics and perform quantum gates in longer ion strings, the second position is to set up a novel cryogenic Rydberg ion trap experiment.
Trapped Rydberg ions are a new system for quantum computation. By laser pulses the ions’ outermost electron is excited to a high-lying Rydberg orbital . Such Rydberg ions are million times bigger than ions in the ground state, and due to their size obtain very peculiar properties. Trapped ions can be entangled via a strong Rydberg interaction in less than a microsecond . This method supports fast entangling gates in large ions crystals, thus enabling a fast trapped ion quantum computer or quantum simulator.
 Higgins, et al., Coherent control of a single trapped Rydberg ion, Physical Review Letters 119 (22), 220501 (2017).
 Zhang, et al., Submicrosecond entangling gate between trapped ions via Rydberg interaction, Nature 580, 345 (2020).