Suppression of dissipation in a laser-driven qubit by white noise

• Two noisy control schemes for a laser-driven qubit are proposed.
• Inspiring dissipation-suppression process is demonstrated both analytically and numerically.
• The fidelity improvement is specified for the trapped ion by controlling the key parameters.

Decoherence of an open quantum system could be universally slowed down via ultra-fast modulation including regular, concatenated, random and even noisy control pulse sequences. We propose two noisy control schemes for a laser-driven qubit in order to suppress the dissipation induced by the environment, where employment of a weak driving laser is to alleviate the requirement for the control pulse strength down to the microwave regime. Calculations and analyses are based on a dynamical decoupling approach governed by the quantum-state-diffusion equation and the standard perturbation theory. The schemes can be applied to various systems, such as the cold atoms and quantum dots, manipulated by lasers for quantum information processing.