Robust dynamical decoupling

Understand

Quantum computers, which process information encoded in quantum mechanical systems, hold the potential to solve some of the hardest computational problems.

• A substantial obstacle for the further development of quantum computers is the fact that the life time of quantum information is usually too short to allow practical computation.
• A promising method to increase the life time, known as dynamical decoupling, consists of applying a periodic series of inversion pulses to the quantum bits.
• In the present review, we give an overview of this technique and compare different pulse sequences proposed earlier.