Atomphysik und Quantencomputing
Rainer Blatt (Innsbruck)

In this talk, the basic functional principles of quantum information processing
are reviewed and the state-of-the-art of the Innsbruck trapped-ion
quantum computer is reported. With strings of trapped ions, we implement
a quantum information processor and perform quantum operations.
We present an overview on the available quantum toolbox and discuss
the scalability of the approach. The quantum way of doing computations is
illustrated with analog and digital quantum
simulations. Employing universal quantum computations, we investigate
the dynamics of the Lattice Schwinger model [1], a gauge theory of 1D
quantum electrodynamics and using a hybridclassical
ansatz, we determine steady-state properties of the Hamiltonian
[2]. Using tailored quantum operations, we obtain optimized
measurements for spectroscopy [3].
[1] E. A. Martinez et al., Nature 534, 516 (2016).
[2] C. Kokail et al., Nature 569, 355–360 (2019).
[3] C. Marciniak et al., arXiv:2106.01860 (2021).