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理论物理通讯：英文版

Suppression of Amplitude Decoherence in Arbitrary n-Level Atom in -Configuration with Bang-Bang Controls

Yan Wang, Xiao Liu

Published Jan 1, 2008• 0 citations
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Abstract

In this paper,we give Bang-Bang (BB) decoupling schemes to suppress the amplitude decoherence in the five- and six-level atom systems in -configuration.We generalize this scheme to the arbitrary level atom system in E-configuration.The corresponding decoupling operators are given explicitly.

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In this paper, we derive the conditions of maintaining quantum coherence in arbitrary n-level atom in Ξ-configuration with Bang-Bang (BB) controls when the system exists the phase decoherence, the amplitude decoherence and the general decoherence (the amplitude damping and phase damping simultaneously), respectively. On this basis, we propose our BB decoupling scheme to suppress the phase decoherence in arbitrary n-level atom in Ξ-configuration. The corresponding decoupling operators are derived explicitly. At last we design the BB decoupling scheme to suppress phase decoherence for a six-level atom system in Ξ-configuration.