简介:AschemeforcontrolledteleportationofanunknownN-qubitentangledGHZstatefromthesenderAlicetothedistantreceiverBobisproposed.Andm-qubitGHZstateissufficientforthetaskofcontrolbymspatially-separatedsupervisors.Conditionedonthelocaloperationsexecutedbyallparticipants,Bobcanfaithfullyrestoretheoriginalstatebyperformingrelevantunitarytransformationswiththeaidofsomeclassicalmessageaboutmeasurementresults.Anyone'sabsencewillabsolutelyleadtothefailureofteleportation.
简介:Awatt-classbackwardwaveoscillatorisproposed,usingtheconcisesinewaveguideslow-wavestructurecombinedwithapencilelectronbeamtooperateat220GHz.Firstly,thedispersioncurveofthesinewaveguideiscalculated,then,theoscillationfrequencyandoperatingvoltageofthedevicearepredictedandthecircuittransmissionlossiscalculated.Finally,theparticle-in-cellsimulationmethodisusedtoforecastitsradiationperformance.Theresultsshowthatthisnovelbackwardwaveoscillatorcanproduceover1-Wcontinuouswavepoweroutputinafrequencyrangefrom210GHzto230GHz.Therefore,itwillbeconsideredasaverypromisinghigh-powermillimeter-wavetoterahertz-waveradiationsource.
简介:提出了一个基于约瑟夫森电荷量子比特实现未知三粒子的GHZ态的方案。在这方案中,三对两粒子纠缠态作为量子通道。此外,不需要bell测量。以目前的技术,在该方案中所用到的设备都可以实现。
简介:一个广泛地集成的40G-ROF和10-Gb/sWDM-PON多服务存取系统被建议并且试验性地示威了。这个计划由同时播送无线的独立2.5-Gb/s和10-Gb/s电线信号的40G-ROF和10-Gb/sWDM-PON的一个综合系统组成。在基础车站,它采用调整在DPSK下游的信号上策划在上游的OOK信号,它被remodulating完成,到减少基础车站的费用。传播实验在25-km-long单身者模式纤维(SMF-28)上被执行。下游的PON和ROF的敏感表明的结果表演是[?]14.5dBm并且[?]21.5dBm,分别地并且在上游的信号的敏感是[?]25.3dBm。[从作者抽象]
简介:ThestimulatedBrillouinscattering(SBS)thresholdenhancementfactorinapurewhitenoiselinewidthbroadeningYb-dopedfiberamplifier(YDFA)withashortlargemodeareafiberistheoreticallyandexperimentallystudied.Wedemonstratea1064.08nm,11.6GHzlinewidth,1.5kWoutputpowerYDFAwithanSBSthresholdenhancementof~57(26WSBSthresholdwithsinglefrequencyseed).Theoutputbeamisnear-diffractionlimitedwithabeamqualityfactorofM~2=1.15andaslopeefficiencyofupto87%.NoSBSorstimulatedRamanscatteringeffectsareobservedinthewholepowerrange.Furtherpowerscalingislimitedbytheavailablepumppowerinoursystem.