简介:Weshowhowquantumentangledbiphotonstatescanbeusedtorealizeghostscattering,anonlocalschemetoobtainscatteringinformationofanunknownobjectthroughthecorrelationmeasurementofthescatteringphotonsintwodifferentopticalpaths.WepresentaframeworktodescribethebiphotonghostscatteringprocessfromtheT-matrixformulaofthescatteringtheory.Wefindthescatteringinformationofatestobjectcanberetrievedfromeitherthetestarmorthereferencearm.Byadjustingthebiphotonstates,theghostscatteringpatternsmaybevariedfromthescatteringpatternoftheobjectinthetestarmtotheobjectinthereferencearm.
简介:Ghostimagingcouldbeusedtomakeaquickidentificationoforthogonalobjectsbymeansofphotocurrentcorrelationmeasurements.Inthispaper,weextendthemethodtoidentifynonorthogonalobjects.Inthemethod,anobjectisilluminatedbyonephotonfromanentangledpair,andtheotheroneisdiffractedintoaparticulardirectionbyapre-establishedmultiple-exposurehologramintheidlerarm.Bythecorrelationmeasurements,thenonorthogonalobjectinthesignalarmcouldbediscriminatedwithinaveryshorttime.Theconstraintsfortheidentificationofnonorthogonalobjectsarepresented,whichshowthatthenonorthogonalobjectscanbediscriminatedwhentheoverlappingportionbetweenanytwoobjectsislessthanhalfofalltheobjectsintheset.Thenumericalsimulationsfurtherverifytheresult.
简介:Thefeaturesofthecharacteristicmatrixusedinlinearintensitycorrelationreconstructionmethodsaredirectlyrelatedtothequalityofghostimaging.Inordertosuppressthenoisecausedbytheoff-diagonalelementsinthecharacteristicmatrix,weproposeareconstructionmethodforghostimagingcalledscalar-matrix-structuredghostimaging(SMGI).Thecharacteristicmatrixismadetoapproximateascalarmatrixbymodifyingthemeasurementmatrix.ExperimentalresultsshowthatSMGIimprovesthepeaksignal-to-noiseratiooftheobjectreconstructionsignificantlycomparedwithdifferentialghostimaging,eveninthecaseofanonzerotwo-armlongitudinaldifference,whichisapromisingresultforpracticalapplications.
简介:Thevibrationisoneoftheimportantfactorsaffectingimagingqualityofconventionalremotesensingimagingbecausetherelativemotionbetweentheimagingsystemandthetargetcanresultinthedegradationofimagingquality.Theinfluenceofthevibrationofthedetectorinthetestpathonreflectiveghostimaging(RGI)isinvestigatedtheoreticallyandexperimentally.Weanalyzetheeffectsofthevibratingamplitudeandvelocity.Theresultsdemonstratethatthemicrovibrationsofthebucketdetectorhavealmostnoimpactontheimagingresolutionandsignal-to-noiseratio(SNR)ofRGI,i.e.,thedegradationofimagingqualitycausedbythevibrationofthedetectorcanbeovercometosomeextent.Ourresultscanbehelpfulforremotesensingimaging.
简介:WeassumegeneralizedghostPilgrimdarkenergy(GGPDE)modelinthepresenceofcolddarkmatterinflatFRWuniverse.WithsuitablechoiceofinteractiontermbetweenGGPDEandcolddarkmatter,weinvestigatethenatureofequationofstateparameterforGGPDE.Also,weinvestigatethenaturesofdynamicalscalarfieldmodels(suchasquintessence,tachyon,k-essence,anddilatondarkenergy)andconcernedpotentialsthroughthecorrespondencephenomenonbetweenGGPDEandthesemodels.
简介:Wepresentapseudo-inverseghostimaging(PGI)techniquewhichcandramaticallyenhancethespatialtransverseresolutionofpseudo-thermalghostimaging(GI).IncomparisonwithconventionalGI,PGIcanbreakthelimitationontheimagingresolutionimposedbythespeckle’stransversesizeontheobjectplaneandalsoenablesthereconstructionofanN-pixelimagefrommuchlessthanNmeasurements.Thisfeaturealsoallowshigh-resolutionimagingofgray-scaleobjects.Experimentalandnumericaldataassessingtheperformanceofthetechniquearepresented.