Kev txhim kho ntawm kev siv tshuab sib txuas lus quantum hauv Suav teb tau nce qib ntau theem. Pib txij li theem kev kawm thiab kev tshawb fawb xyoo 1995, txog xyoo 2000, Suav teb tau ua tiav qhov kev sim faib cov quantum key uas ntev li 1.1 km. Lub sijhawm txij xyoo 2001 txog 2005 yog ib theem ntawm kev txhim kho sai uas thaum lub sijhawm ntawd kev sim faib cov quantum key ua tiav ntawm qhov deb ntawm 50 km thiab 125 km tau ua tiav [1].
Nyob rau xyoo tas los no, Tuam Tshoj tau ua tiav ntau yam hauv kev sib txuas lus quantum. Tuam Tshoj yog thawj lub teb chaws uas tau tsim lub satellite sim quantum science, "Micius," thiab tau tsim ib txoj kab sib txuas lus ruaj ntseg quantum uas ntev ntau txhiab mais ntawm Beijing thiab Shanghai. Tuam Tshoj tau ua tiav los tsim ib lub network sib txuas lus quantum los ntawm lub ntiaj teb mus rau qhov chaw nrog tag nrho ntev li 4600 kilometers. Ntxiv rau qhov no, Tuam Tshoj kuj tau ua tiav kev vam meej hauv kev suav lej quantum. Piv txwv li, Tuam Tshoj tau tsim lub ntiaj teb thawj tus qauv ntawm lub computer quantum photonic, ua tiav los tsim lub prototype computing quantum "Jiuzhang" nrog 76 photons, thiab tau ua tiav los tsim lub prototype computing quantum superconducting "Zu Chongzhi" uas muaj 62 qubits.
Kev siv cov khoom siv passive hauv cov txheej txheem sib txuas lus quantum yog qhov tseem ceeb tshaj plaws. Piv txwv li, cov khoom siv xws li microwave attenuators, directional couplers, power dividers, microwave filters, phase shifters, thiab microwave isolators yuav siv tau. Cov khoom siv no feem ntau yog siv los ua thiab tswj cov teeb liab microwave uas tsim los ntawm quantum bits.
Cov khoom siv microwave attenuators tuaj yeem txo lub zog ntawm cov teeb liab microwave kom tiv thaiv kev cuam tshuam nrog lwm qhov ntawm lub cev vim muaj zog ntau dhau ntawm cov teeb liab. Cov khoom sib txuas lus tuaj yeem faib cov teeb liab microwave ua ob ntu, ua kom yooj yim rau kev ua cov teeb liab nyuaj dua. Cov lim dej microwave tuaj yeem lim cov teeb liab ntawm cov zaus tshwj xeeb rau kev tshuaj xyuas thiab ua cov teeb liab. Cov hloov theem tuaj yeem hloov cov theem ntawm cov teeb liab microwave, siv los tswj lub xeev ntawm quantum bits. Cov khoom cais microwave tuaj yeem ua kom ntseeg tau tias cov teeb liab microwave kis mus rau hauv ib qho kev taw qhia xwb, tiv thaiv cov teeb liab rov qab thiab cuam tshuam nrog lub cev.
Txawm li cas los xij, cov no tsuas yog ib feem ntawm cov khoom siv microwave passive uas yuav siv tau rau hauv kev sib txuas lus quantum. Cov khoom siv tshwj xeeb uas yuav siv yuav tsum tau txiav txim siab raws li kev tsim thiab cov kev xav tau ntawm lub kaw lus sib txuas lus quantum tshwj xeeb.
Lub Tswv Yim muab ntau yam khoom siv microwave passive rau kev sib txuas lus quantum
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Lub sijhawm tshaj tawm: Lub Rau Hli-01-2023