文档介绍：该【凝聚态物理与材料+Quantum-Supremacy课件 】是由【miao19720107】上传分享，文档一共【25】页，该文档可以免费在线阅读，需要了解更多关于【凝聚态物理与材料+Quantum-Supremacy课件 】的内容，可以使用淘豆网的站内搜索功能，选择自己适合的文档，以下文字是截取该文章内的部分文字，如需要获得完整电子版，请下载此文档到您的设备，方便您编辑和打印。Toward“QuantumSupremacy”withMultiphotonBosonSampling
Toward“QuantumSupremacy”wit
Arealquantummachinewhichismorepowerfulthanearlyclassicalcomputers,suchasENIACandTRADIC.
Arealquantummachinewhichi
Quantuminformationprocessingwithphotons
Quantumbitscanbeencodedinthe
polarizationofsinglephotons
ArbitrarySU(2)rotation
Projectivemeasurement
Whydowelikephotons?
Flyingqubit(fastestquantuminformationtransmitter)
Robustqubit(withweakinteractionwithenvironment)
High-precisionmanipulationwithoff-the-shelldevices
Quantuminformationprocessi
Opticalquantumcomputing
Single-photonsources
Unitarytransformation
(beamsplitters+phaseshifters)
Adaptivemeasurements
Universalquantum
computing!
Single-photonsources
Unitarytransformation
(beamsplitters+phaseshifters)
Photonnumbermeasurements
Non-universalquantum
computing!
2-qubitgates,faulttolerance
Millionsofphysicalqubits-Tensofphysicalqubits
BosonSamplingforphotons
CZ-gate,errorcorrection
OpticalquantumcomputingSingl
ClassicalBoson
Bosonsampling
Classical
Bosonsampling
Bosonsamplingisasampling
problem;
Calculatingapermanentneeds
O(n2n)time,it’sa#P-completehard
problemforclassicalcomputers.
It’safeasiblewaytodemonstrate
quantumsupremacy.
Itmightprovidedirectexperimental
evidenceagainstExtendedChurch-
Turingthesis.
BosonsamplingBosonsamplin
Bosonsamplingexperiments
bosonsamplingtestedupto3photonsforarbitraryinputconfigurations.
Broomeetal.,Science339,794-798(2013);Springetal.,Science339,798-801(2013).
Tillmannetal.,,540-544(2013);Crespietal.,,545-549(2013).
Carolanetal.,Science349,711-716(2015);Bentivegnaetal.,,e1400255(2015).
Whatarelimitingus?
ScottAaronson&AlexArkhipov,
Bosonsamplingexperimentsboso
Ifwewanttobuildahighperformancebosonsamplingmachine,wehavetodevelop:
-photonsources
-scaleultra-low-lossphotoniccircuit
+
+
Ifwewanttobuildahighper
Single-photonsources
NobelPrize2005
Single-
Indistinguishablesinglephotons
Hong-Ou-Mandelinterference
forindistinguishablephotons
i
i
“exchangeinteraction”
Indistinguishablesinglephoto