From squeezing to Gaussian entanglement via beamsplitters

doi:10.1088/1361-6455/ab746b

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	From squeezing to Gaussian entanglement via beamsplitters
	Fu,Shuangshuang 1; Luo,Shunlong2,3 ; Zhang,Yue 2,3
	2020-03-18
发表期刊	Journal of Physics B: Atomic, Molecular and Optical Physics
ISSN	0953-4075
卷号	53 期号:8
摘要	Abstract We investigate relations between squeezing of separable input states and entanglement of output states generated by a beamsplitter, both of which are valuable nonclassical resources for quantum information processing. Motivated by the seminal work of Asboth′ et al [2005 Phys. Rev. Lett. 94 173602], where a systematic study of nonclassicality (including squeezing) and beamsplitter-generated entanglement is conducted, we consider the situation when the two input states are all Gaussian and identify certain constraints on the squeezing parameters to generate entanglement. Contrary to naive expectation, large squeezing does not necessarily guarantee large entanglement. Depending on the phase relations between the input states and the beamsplitters, the conditions to generate entanglement vary, which may be regarded as a manifestation of interference. In two typical cases, it is the difference or sum of the squeezing amplitudes that plays a key role in generating entanglement. Analytic expressions of entanglement in terms of the difference or sum of the squeezing amplitudes are obtained, which are further shown to be monotonic in the relevant parameters.
关键词	beamsplitters squeezing Gaussian entanglement interference nonclassicality
DOI	10.1088/1361-6455/ab746b
语种	英语
WOS记录号	IOP:0953-4075-53-8-ab746b
出版者	IOP Publishing
引用统计
文献类型	期刊论文
条目标识符	http://ir.amss.ac.cn/handle/2S8OKBNM/50311
专题	应用数学研究所
作者单位	1.School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, People's Republic of China 2.Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190, People's Republic of China 3.School of Mathematical Sciences, University of the Chinese Academy of Sciences, Beijing 100049, People's Republic of China
推荐引用方式 GB/T 7714	Fu,Shuangshuang,Luo,Shunlong,Zhang,Yue. From squeezing to Gaussian entanglement via beamsplitters[J]. Journal of Physics B: Atomic, Molecular and Optical Physics,2020,53(8).
APA	Fu,Shuangshuang,Luo,Shunlong,&Zhang,Yue.(2020).From squeezing to Gaussian entanglement via beamsplitters.Journal of Physics B: Atomic, Molecular and Optical Physics,53(8).
MLA	Fu,Shuangshuang,et al."From squeezing to Gaussian entanglement via beamsplitters".Journal of Physics B: Atomic, Molecular and Optical Physics 53.8(2020).