Controllable generation of highly nonclassical states from nearly pure squeezed vacua
Controllable generation of highly nonclassical states from nearly pure squeezed vacua
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DOI：
10.1364/oe.15.003568
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发表时间：
2006-09
期刊：
影响因子：
3.8
通讯作者：
K. Wakui;H. Takahashi;A. Furusawa;M. Sasaki
中科院分区：
文献类型：
--
作者：
K. Wakui;H. Takahashi;A. Furusawa;M. Sasaki
我们提出了各种高度非经典光态的可控产生，包括单光子态和介观不同组分的叠加态。所产生的态的高度非经典性是由维格纳函数的负性来衡量的，这是我们所知道的最大的。我们的方案是基于光子减法从一个几乎纯的压缩真空，从一个光学参量振荡器产生的非线性介质的极化KTiOPO$_4$晶体。这是实现通用量子门基本元件的重要一步，也是作为光谱学和量子存储研究的高度非经典输入探针的重要一步。
We present controllable generation of various kinds of highly nonclassical states of light, including the single photon state and superposition states of mesoscopically distinct components. The high nonclassicality of the generated states is measured by the negativity of the Wigner function, which is largest ever observed to our knowledge. Our scheme is based on photon subtraction from a nearly pure squeezed vacuum, generated from an optical parametric oscillator with a periodically-poled KTiOPO$_4$ crystal as a nonlinear medium. This is an important step to realize basic elements of universal quantum gates, and to serve as a highly nonclassical input probe for spectroscopy and the study of quantum memory.