A maximal photon number entangled state,namely NOON state,can be adopted for sensing with a quantum enhancedprecision.In this work,we designed silicon quantum photonic chips containing two types of Mach-Zehnder interf...A maximal photon number entangled state,namely NOON state,can be adopted for sensing with a quantum enhancedprecision.In this work,we designed silicon quantum photonic chips containing two types of Mach-Zehnder interferometerswherein the two-photon NOON state,sensing element for temperature or humidity,is generated.Compared with classicallight or single photon case,two-photon NOON state sensing shows a solid enhancement in the sensing resolution andprecision.As the first demonstration of on-chip quantum photonic sensing,it reveals the advantages of photonic chips forhigh integration density,small-size,stability for multiple-parameter sensing serviceability.A higher sensing precision isexpected to beat the standard quantum limit with a higher photon number NOON state.展开更多
微塑料(microplastics,MPs)其自身是一种新兴污染物,且还可作为载体吸附重金属等其它污染物,对生态环境造成威胁.本文以Web of Science核心数据库及Science Direct数据库作为数据源,搜集了2016—2022年间发表的有关微塑料对重金属吸附...微塑料(microplastics,MPs)其自身是一种新兴污染物,且还可作为载体吸附重金属等其它污染物,对生态环境造成威胁.本文以Web of Science核心数据库及Science Direct数据库作为数据源,搜集了2016—2022年间发表的有关微塑料对重金属吸附的文献,分析了不同环境条件下微塑料对重金属的吸附及其影响影响因素,还比较了室内实验结果与实际环境的差异.结果表明,不同微塑料对重金属吸附量不同,其差异主要与微塑料官能团、结构,重金属水合离子半径等因素有关.其中,聚苯乙烯(polystyrene,PS)较其它微塑料更易吸附重金属,而铅(Pb)则更易被微塑料吸附.另外,微塑料老化程度、粒径大小以及盐度、pH值等因素也都会影响微塑料对重金属吸附.研究还发现,真实水环境中微塑料对重金属的吸附量总体上小于室内实验结果,也就是说,室内实验往往高估了微塑料对重金属的吸附.展开更多
基金supported by the National Key R&D Program of China(Grant No.2022YFF0712800)Innova-tion Program for Quantum Science and Technology(Grant No.2021ZD0301500).
文摘A maximal photon number entangled state,namely NOON state,can be adopted for sensing with a quantum enhancedprecision.In this work,we designed silicon quantum photonic chips containing two types of Mach-Zehnder interferometerswherein the two-photon NOON state,sensing element for temperature or humidity,is generated.Compared with classicallight or single photon case,two-photon NOON state sensing shows a solid enhancement in the sensing resolution andprecision.As the first demonstration of on-chip quantum photonic sensing,it reveals the advantages of photonic chips forhigh integration density,small-size,stability for multiple-parameter sensing serviceability.A higher sensing precision isexpected to beat the standard quantum limit with a higher photon number NOON state.
文摘微塑料(microplastics,MPs)其自身是一种新兴污染物,且还可作为载体吸附重金属等其它污染物,对生态环境造成威胁.本文以Web of Science核心数据库及Science Direct数据库作为数据源,搜集了2016—2022年间发表的有关微塑料对重金属吸附的文献,分析了不同环境条件下微塑料对重金属的吸附及其影响影响因素,还比较了室内实验结果与实际环境的差异.结果表明,不同微塑料对重金属吸附量不同,其差异主要与微塑料官能团、结构,重金属水合离子半径等因素有关.其中,聚苯乙烯(polystyrene,PS)较其它微塑料更易吸附重金属,而铅(Pb)则更易被微塑料吸附.另外,微塑料老化程度、粒径大小以及盐度、pH值等因素也都会影响微塑料对重金属吸附.研究还发现,真实水环境中微塑料对重金属的吸附量总体上小于室内实验结果,也就是说,室内实验往往高估了微塑料对重金属的吸附.
