arXiv quant-ph/05081192005-08-18quant-ph

单囚禁原子的受控光子发射和拉曼跃迁实验

Controlled photon emission and Raman transition experiments with a single trapped atom

M. P. A. Jones, B. Darquie, J. Beugnon, J. Dingjan, S. Bergamini, Y. Sortais, G. Messin, A. Browaeys, P. Grangier

备注：: 8 pages, 4 figures, proceedings of the ICOLS05 conference, replacement corrects numerical error in Rabi frequency (Section 4)
DOI：: 10.1142/9789812701473_0042

摘要：

我们介绍了最近的结果相干控制的光学跃迁的一个单一的铷原子，被困在一个光镊。我们使用共振光脉冲激发原子，与激发态的寿命（26 ns）相比，共振光脉冲很短（4 ns）。通过改变激光脉冲的强度，我们可以观察到可调节数量的拉比振荡，然后在光关闭后自由衰减。为了产生脉冲，我们已经开发了一种新的激光系统的基础上倍频的电信激光二极管在1560 nm。通过设置激光强度来产生π脉冲，我们使用这种相干控制来产生高质量的单光子触发源。我们在探测器上获得了9600 s-1的平均单光子速率。二阶时间关联函数的测量表明，在零延迟几乎完美的反聚束。此外，我们提出了初步的结果，利用拉曼跃迁耦合的两个超精细能级的基态我们的囚禁原子。这将使我们能够准备和控制由两个超精细子能级形成的量子比特。

英文摘要：

We present recent results on the coherent control of an optical transition in a single rubidium atom, trapped in an optical tweezer. We excite the atom using resonant light pulses that are short (4 ns) compared with the lifetime of the excited state (26 ns). By varying the intensity of the laser pulses, we can observe an adjustable number of Rabi oscillations, followed by free decay once the light is switched off. To generate the pulses we have developed a novel laser system based on frequency doubling a telecoms laser diode at 1560 nm. By setting the laser intensity to make a pi-pulse, we use this coherent control to make a high quality triggered source of single photons. We obtain an average single photon rate of 9600 s-1 at the detector. Measurements of the second-order temporal correlation function show almost perfect antibunching at zero delay. In addition, we present preliminary results on the use of Raman transitions to couple the two hyperfine levels of the ground state of our trapped atom. This will allow us to prepare and control a qubit formed by two hyperfine sub-levels.

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摘要：

英文摘要：

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