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arXiv quant-ph/0206024quant-ph
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电磁感应透明光“停止”的双光子线宽

Two-photon linewidth of light "stopping" via electromagnetically induced transparency

Claudia Mewes, Michael Fleischhauer

摘要:

我们分析了最近提出的绝热传输技术的“停止”的光使用电磁感应透明(EIT)的双光子线宽。结果表明,当探测脉冲的光谱位于EIT的初始透明窗口内,且双光子失谐量$δ$小于集体耦合强度时,可以实现光激发到原子的成功而可靠的转移(集体真空拉比频率)$g\sqrt{N}$除以$\sqrt{γT}$,其中$γ$是辐射衰变率,$N$是样品中有效原子数,$T$是脉冲持续时间。因此,在光学厚介质中,即使对于具有相当大的双光子失谐或不均匀加宽的系统,光的“存储”和检索也是可能的,具有高保真度。

英文摘要:

We analyze the two-photon linewidth of the recently proposed adiabatic transfer technique for ``stopping'' of light using electromagnetically induced transparency (EIT). We shown that a successful and reliable transfer of excitation from light to atoms and back can be achieved if the spectrum of the input probe pulse lies within the initial transparency window of EIT, and if the two-photon detuning $δ$ is less than the collective coupling strength (collective vacuum Rabi-frequency) $g\sqrt{N}$ divided by $\sqrt{γT}$, with $γ$ being the radiative decay rate, $N$ the effective number of atoms in the sample, and $T$ the pulse duration. Hence in an optically thick medium light ``storage'' and retrieval is possible with high fidelity even for systems with rather large two-photon detuning or inhomogeneous broadening.

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