Decoherence suppression via non-Markovian coherent feedback control

Shi Bei Xue, Re Bing Wu, Wei-Min Zhang, Jing Zhang, Chun Wen Li, Tzyh Jong Tarn

Research output: Contribution to journalArticlepeer-review

67 Citations (Scopus)

Abstract

In this paper, we present a coherent feedback control scheme for non-Markovian bosonic systems, in which an engineered quantum control field is introduced to couple both the system and the noise bath. The closed-loop dynamics of the system is described by an exact non-Markovian quantum Langevin equation, where the spectral density functions of the noise and the quantum control field, as well as their coupling, are combined into a single memory kernel function. We show that the coupling between the quantum control field with the noise bath can be used as a feedback control to modulate the memory kernel function. As a result, the noise bath can be driven out of resonance with the system and the decoherence can be efficiently suppressed. The effectiveness of the controllability is demonstrated with a photonic circuit in photonic crystals.

Original languageEnglish
Article number052304
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume86
Issue number5
DOIs
Publication statusPublished - 2012 Nov 5

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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