# Trapped Ion Quantum Technologies

# Realization of Trapped Strontium Rydberg Ions

In this project we focus on the realization of trapped Rydberg ions. This will bring together two quantum systems: trapped ions and Rydberg atoms. Joining them will form a novel quantum system with advantages from both sides. Trapped Rydberg ions are a promising system for applications in quantum information processing and quantum simulation.

# Quantum Memories

Distant entangled particles are an important resource in quantum information. Entangled photons can be easily sent to distant locations for applications like quantum teleportation and quantum communication.

# Quantum Computation with Trapped Ions

Trapped Ions are one of the most mature implementation for realizing a quantum computer. Here, ions are confined in a linear Paul trap and are cooled with laser light. The ions repel each other due to Coulomb interaction and crystallize in linear, 2d, or 3d structures depending on the number of ions and the shape of the confining potential. Thanks to the ultra-high vacuum conditions and the deep confining potential, the ions are well isolated from the environment and stay trapped for days. Quantum information is encoded in the ions’ electronic states and is manipulated by laser or microwave pulses. Also, the ions in the trap can exchange quantum information via their common motion, which makes it possible to perform quantum calculations on an ion string.

## Condensed Matter and Quantum Optics division

**Head of division**

Eddy Ardonne

Room C5:3025

Tel: +46 (0)8 5537 8596

E-mail: ardonne@fysik.su.se