Article ID Journal Published Year Pages File Type
1866741 Physics Letters A 2015 7 Pages PDF
Abstract

•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.

Related Topics
Physical Sciences and Engineering Physics and Astronomy Physics and Astronomy (General)
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