Nrog txoj kev loj hlob sai ntawm cov ntaub ntawv thev naus laus zis, teeb meem kev ruaj ntseg ntawm kev sib txuas lus hauv network tau dhau los ua pom tseeb. Nrog rau kev siv lub zog ntawm cov khoos phis tawj nce zuj zus, cov txheej txheem encryption ib txwm raug ntsib nrog cov kev pheej hmoo loj thiab yuav muaj kev cuam tshuam rau kev txiav txim siab los ntawm quantum computers. Yog li ntawd, cov kws tshawb fawb tau tsim Quantum Key Distribution (QKD) thev naus laus zis raws li Quantum mechanics thiab cryptography, uas yog hu ua Quantum kev sib txuas lus zais cia thiab muab kev lav zoo rau cov ntaub ntawv kev ruaj ntseg.
Lub hauv paus ntsiab lus ntawm quantum kev sib txuas lus zais cia yog kev siv lub xeev quantum tsis tuaj yeem ntsuas thiab rov ua dua, ntawm qhov kawg ntawm kev sib txuas lus nrog quantum tus yuam sij rau cov ntaub ntawv encryption, cov ntaub ntawv yog cuam tshuam lossis luam tawm, lub xeev quantum qub yuav raug rhuav tshem, kom kev sib kis. sab paub lub hav zoov ntawm eavesdropper, thiaj li hu ua quantum kev sib txuas lus kiag li muaj kev ruaj ntseg cov ntaub ntawv kis tau tus mob tswvyim.
Txawm li cas los xij, quantum kev ruaj ntseg thev naus laus zis ntsib ntau yam teeb meem hauv kev sib txuas lus ntev ntev. Ib qho photon ntawm quantum xeev yog indivisible thiab tsis tuaj yeem muab duplicated, yog li nws tsis tuaj yeem muab duplicated thiab amplified zoo li ib txwm sib txuas lus, uas zoo heev txwv qhov kev ncua deb ntawm quantum key hauv optical fiber. Yog li ntawd, kev sib kis ntawm quantum zais cia kev sib txuas lus raws li ib qho photon thev naus laus zis feem ntau nyob ntawm qhov poob hauv kab, thiab cov fiber ntau optical nrog qis attenuation yog ib txoj hauv kev zoo los txuas ntxiv kev sib kis.
Yog li ntawd, daim ntawv thov ntawm ultra-low poob optical fiber nyob rau hauv quantum kev sib txuas lus yuav dhau los ua ib qho tseem ceeb heev.
Yog li, dab tsi yog ultra-low-loss fiber?
Qhov poob ntawm optical fiber ntau yog los ntawm Rayleigh tawg poob thiab nqus cov khoom tseem ceeb. Cov tsoos kho qhov muag fiber ntau yuav tsum tau doped nyob rau hauv cov tub ntxhais los txhim kho qhov refractive index ntawm cov tub ntxhais, tab sis nws yuav ua rau siab Rayleigh scattering thiab optical fiber attenuation. Nyob rau hauv ultra-tsawg-tsawg optical fiber, ntshiab silica yog siv nyob rau hauv cov tub ntxhais thiab cladding doping txo cov refractive index, uas tsis tsuas yog txo lub attenuation los ntawm Rayleigh tawg ntawm cov tub ntxhais, tab sis kuj paub qhov kis ntawm tag nrho cov kev xav ntawm lub teeb liab teeb.
Daim ntawv thov ntawm ultra-tsawg poob optical fiber nyob rau hauv quantum kev sib txuas lus
Rau kev sib txuas lus quantum, peb lub hom phiaj tseem ceeb tshaj plaws ntawm kev siv quantum tseem ceeb faib tshuab yog txhawm rau txhim kho kev sib txuas lus ruaj ntseg, txhim kho tus nqi ruaj ntseg coding thiab txhim kho kev ruaj ntseg ntawm lub system. Yog li yuav ua li cas ultra-tsawg-tsawg fiber ntau ua haujlwm hauv cov haujlwm no?
1) Ua kom muaj kev nyab xeeb hla kev deb
2) Nce tus lej lej
3) Txhawb kev lag luam ntawm cov fiber ntau thiab fiber co-fiber kis tau tus mob
Tom qab ntau lub koom haum sim tau sim thiab sim cov ultra-tsawg poob fiber ntau, ultra-tsawg poob fiber ntau muaj cov txiaj ntsig zoo hauv kev ua kom muaj kev nyab xeeb ntawm kev sib txuas lus, kev txhim kho kev ruaj ntseg code tus nqi thiab kev txhim kho kev ruaj ntseg ntawm lub system, uas yuav txhawb quantum xam thiab quantum. . Txoj kev loj hlob sai ntawm kev sib txuas lus ruaj ntseg plays ib qho tseem ceeb network infrastructure nyob rau hauv lub era ntawm quantum xam.
