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*简介
具有正交振幅和正交位相分量量子关联的纠缠态光场已经被广泛应用于量子离物传态,量子密集编码,量子纠缠交换等连续变量量子信息中。为了实现高质量的信息传递和远距离的量子通信,必须首先获得具有高关联度的纠缠态光场。但是受到晶体,内腔损耗等实验因素的制约,仅仅利用一个光学参量放大器而产生的纠缠态光场不一定能满足实际需求,这就要求我们开展纠缠态光场的纠缠增强与操控的研究。我们从实验上实现了通过一个光学参量放大器对连续变量纠缠态光场的增强及操控,运转于反放大状态的光学参量放大器对振幅反关联和位相正关联的纠缠光束有增强作用,可以将纠缠态光场的纠缠度由初始的2.4dB提高至3.0dB;而运转于放大状态的光学参量放大器会使振幅反关联和位相正关联的纠缠光束变为振幅正关联和位相反关联。
而且为了实现多节点的量子信息网络,就需要纠缠态光场可以与原子相互作用,这样实现频率可调谐的纠缠态光场非常重要。目前我们正在利用自行研制的全固化掺钛蓝宝石激光器泵浦光学参量放大器,期望获得连续可调谐的连续变量纠缠态光场,以开展连续变量纠缠存储的实验研究。
*研究人员
谢常德教授,彭堃墀院士,博士生导师
贾晓军副教授,苏晓龙副教授,硕士生导师
博士生2名,硕士生4名
*近期承担的科研项目
1.
连续变量量子信息网络研究,国家自然科学基金重点项目,190万元,
2008.01-2011.12
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连续变量量子纠缠放大的实验与理论研究, 国家自然科学基金,41万元,2011.1-2013.12
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孪生光束量子纠缠特性的实验与理论研究,国家自然科学基金青年科学基金,29万元,2007.01-2009.12
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用强度差压缩态及光纤传输的连续变量量子保密通讯,国家自然科学基金,23万元,2004.1-2006.12
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连续变量量子通讯实验研究, 国家自然科学基金重点项目, 200万元, 2003.01 - 2006.12
*近期发表的学术论文
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Continuous variable
entanglement enhancement and manipulation by a sub-threshold type-II
optical parametric amplifier,
Opt. Lett,
35, 853 (2010)
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外腔谐振倍频单频红光激光器,中国激光
36, 1744 (2009)
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利用非平衡光纤Mach-Zehnder干涉仪探测频率非简并纠缠态光场,物理学报57,
3514 (2008)
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Enhanced Cross-Phase
Modulation Based on a Double Electromagnetically Induced Transparency in
a Four-level Tripod Atomic System,
Phys. Rev. Lett. 101,
073602 (2008)
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Continuous-variable
telecloning with phase-conjugate inputs
Phys. Rev. A 77, 022316 (2008)
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Experimental
investigation about the influence of pump phase noise on
phase-correlation of output optical fields from a non-degenerate
parametric oscillator",
Europhys. Lett. 82, 24003 (2008)
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Dependence of quantum
correlations of twin beams on the pump finesse of an optical parametric
oscillator,
J. Phys. B: At. Mol. Opt. Phys. 41,
035502 (2008)
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连续波Nd:YVO4/LBO稳频倍频红光全固态激光器,
中国激光35, 323
(2008)
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Experimental Preparation of Quadripartite Cluster and Greenberger-Horne-Zeilinger
Entangled States for Continuous Variables,Phys.
Rev. Lett. 98,
070502(2007)
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Continuous variable multipartite entanglement and optical
implementations of quantum communication networks,New
Journal of Physics 9,
314 (2007)
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Nonlocal nondegenerate optical parametric amplifier based on genuine
multipartite entanglement Phys. Rev. A 76, 064301 (2007).
-
Experimental demonstration of quantum entanglement between frequency-nondegenerate
optical twin beams, Opt. Lett. 31, 1133(2006)
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Frequency conversion of an entangled state,Phys.
Rev. A
73,
033817(2006)
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Simultaneous experimental generation of vacuum squeezing and bright
amplitude squeezing from a frequency doubler,Opt.
Lett.
30, 1491 (2005)
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Frequency-stabilized semimonolithic frequency doubler with high output
power,CHINESE
OPTICS LETTERS
3, 395(2005)
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The influence of mode mismatch on correlation measurement in a Bell
state direct detector,J.
Opt. B: Quantum Semiclass. Opt.
7, 189 (2005)
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具有经典相干性的两组EPR纠缠态光场的实验产生,物理学报,
54, 2717 (2005)
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Application of an All-Solid-State, Frequency-Doubled Nd:YAP Laser to the
Generation of Twin Beams at 1080 nm,
Applied Optics,
Vol.41, No.12, 2304-2307
(2002)
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A portable multi-purpose non-classical light source,
Optics Communications,
211, 243–248, (2002)
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