Contents - Max-Planck-Institut für Physik komplexer Systeme
Contents - Max-Planck-Institut für Physik komplexer Systeme
Contents - Max-Planck-Institut für Physik komplexer Systeme
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• C.F.Lee,L.Jean,C.Lee,M.Shaw,andD.J.Vaux.“Interfacialeffectsonamyloidfibrilization.”<br />
DPGSpringmeeting,March2011.<br />
• C.F.Lee. “Perturbationanalysisofareducedmodelforcollectivemotion: Effectsoftheinitial<br />
condition.”DPGSpringmeeting,March2011.<br />
Articlescompletedandwrittenatthe mpipks<br />
1.C.F.Lee(2010)Predictingrareeventsinchemicalreactions:Applicationtoskincellproliferation.<br />
PhysicalReviewE82,021103;E-print:arXiv:1005.4116.<br />
2.C.F.Lee(2010)Fluctuation-inducedcollectivemotion:Asingle-particledensityanalysis.Physical<br />
ReviewE81,031125;E-print:arXiv:1001.2684.<br />
3.C.F.Lee(2011)Singularperturbationanalysisofareducedmodelforcollectivemotion:Arenormalizationgroupapproach.AcceptedinPhysicalReviewE;E-print:arXiv:1102.0407.<br />
4.L.Jean*,C.F.Lee*andD.J.Vaux[*=Jointfirstauthors].Atequilibrium,hydrophobic-hydrophilic<br />
interfacesdeterminethethermodynamicpropertiesofamyloidformation.Submitted.<br />
5.C.F.Lee.Lengthdistributionofself-assembledstiffandflexiblepolymers.Submitted.<br />
CorrelatedQuantumMatter<br />
(Dr.EmilBergholtz)<br />
Iworkonstronglycorrelatedquantummatterusingvariousanalyticalaswellasnumericalapproaches.<br />
Duringmytimeat mpipks,Ihavesofarpublishedonthreedifferenttopics;1)Quantuminformationin<br />
condensedmatter,inparticularvariousentanglementmeasuresasdiagnosticsoffractionalquantumHall<br />
(FQH)phases(Refs.3,4).2)Frustratedquantummagnetism,inparticularworkontheS=1/2Heisenbergmodelonthethree-dimensionalhyperkagomelatticemotivatedbytheexoticNa4Ir3O8compound<br />
(Ref. 2). 3)LimitsofvariousFQHstatesandtheirrelationstointegrablemodelsandtocertainspin<br />
chains(Refs.1,5-7).<br />
Collaborationsatthe mpipks<br />
• WithRoderichMoessnerandAndreasLäuchli,wehavestudiedvalencebondformationanddiscretesymmetrybreakingonthethree-dimensionalhyperkagomelattice,motivatedbytherecent<br />
experimentsontheexoticNa4Ir3O8compound.Thismaterialshowsnosignofmagneticordering<br />
downtothelowesttemperatures,thuspresentingacandidateforaquantumspinliquid.Wehave<br />
recentlyarguedforadifferentscenario:usingaseriesexpansionaroundanarbitrarydimerizedstate<br />
wederivedavalencebondcrystalgroundstatewitha72siteunitcellthatsupportsmany,verylow<br />
lying,excitationsinthesingletsector. Low-energyspinfulexcitations(spinonsandtriplons)are<br />
effectivelyconfinedtovariousemergentlower-dimensionalstructures.Ifapplicabletotherecently<br />
studiedsodiumiridatecompound,Na4Ir3O8,thisscenariohasinterestingobservableimplications,<br />
suchasspatiallyanisotropicneutronscatteringspectraandpossiblymultiplefinitetemperature<br />
signaturesinthemagneticspecificheatduetoamulti-stepbreakingofdiscretesymmetries.Most<br />
saliently,here-asforseveralproposedstatesforanalogouskagomeandpyrochloremagnets-one<br />
mightexpectaclearlyresolvedIsingtransitionatrelativelyhightemperature.<br />
• WithAndreasLäuchliandMasudHaque,wehaveprovidednewinsightsintotheentanglement<br />
inFQHstatesbycontinuouslyvaryingthegeometry,andthusthephysicalboundarybetweenthe<br />
systemandtheenvironment.ForthevonNeumannentropy,ourmethodimprovedthecontrolof<br />
theentanglementscalingsignificantly,andtheprecisionextractionofthetopologicalpart, γ,was<br />
improvedbyaboutanorderofmagnitude(fromanuncertaintyofabout10-30%toabout1-3%in<br />
thesimplestcases).Fortheentanglementspectrum(alsowithJuhaSuorsa,Oslo),thisallowedus<br />
toobtainamicroscopicunderstandingoftheentanglementlevelsbyconnectingtothethin-torus<br />
limitandalsotostudytheinterplaybetweentwospatiallyseparatededges.<br />
106 DetailsandData