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Environment spectrum and coherence behaviours in a rare-earth doped crystal for quantum memory.

ABSTRACT: We theoretically investigate the dynamics of environment and coherence behaviours of the central ion in a quantum memory based on a rare-earth doped crystal. The interactions between the central ion and the bath spins suppress the flip-flop rate of the neighbour bath spins and yield a specific environment spectral density S(?). Under dynamical decoupling pulses, this spectrum provides a general scaling for the coherence envelope and coherence time, which significantly extend over a range on an hour-long time scale. The characterized environment spectrum with ultra-long coherence time can be used to implement various quantum communication and information processing protocols.

SUBMITTER: Gong B

PROVIDER: S-EPMC5740147 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature

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Environment spectrum and coherence behaviours in a rare-earth doped crystal for quantum memory.

Gong Bo B Tu Tao T Zhou Zhong-Quan ZQ Zhu Xing-Yu XY Li Chuan-Feng CF Guo Guang-Can GC

Scientific reports 20171221 1

We theoretically investigate the dynamics of environment and coherence behaviours of the central ion in a quantum memory based on a rare-earth doped crystal. The interactions between the central ion and the bath spins suppress the flip-flop rate of the neighbour bath spins and yield a specific environment spectral density S(ω). Under dynamical decoupling pulses, this spectrum provides a general scaling for the coherence envelope and coherence time, which significantly extend over a range on an h ...[more]

PMID: 29269863

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