More precision in atom trapping for quantum computing

Quantum computing enables more efficient approaches to solving optimisation problems and more precise simulations of quantum mechanical systems. In addition, quantum-supported machine learning is expected to be superior to classical AI.

Quantum computers utilise the quantum information stored in individual atoms in order to process it. For this purpose, qubits are arranged in scalable arrays and manipulated individually with well-controlled laser pulses. Precise knowledge and control of the laser-optical system is essential.

Alignment and testing of optical systems for atom traps

Wavefront measurement technology is used to test the key optical components such as the lens assemblies that focus the laser beam to trap and manipulate the individual atoms. Maximum measurement accuracy is absolutely essential in this application, as even slight aberrations can cause atoms to escape from the trap.

In addition, Shack-Hartmann wavefront sensors are used to align the laser optical system. The extreme measuring range of the Optocraft wavefront sensors (±10° tilt, <10 mm local WF curvature) enables a wavefront measurement to be carried out even if the initial state is severely misaligned, allowing further adjustment steps to be initiated. With additional knowledge about the system behaviour, e.g. from a simulation model, the optimisation process can be made even more efficient – with a minimum of adjustment loops.