Lub ntiaj teb tau tawg los ntawm quantum tseem ceeb txwv thawj zaug. Tus nqi tseem ceeb ntawm qhov tseeb ib leeg-photon qhov chaw tau nce los ntawm 79%.
Quantum Key Distribution(QKD) yog ib qho kev siv tshuab encryption raws li quantum lub hauv paus ntsiab lus thiab qhia tau hais tias muaj peev xwm loj hauv kev txhim kho kev sib txuas lus ruaj ntseg. Cov thev naus laus zis no xa cov yuam sij encryption los ntawm kev siv lub xeev quantum ntawm photons lossis lwm yam khoom. Txij li cov xeev quantum no tsis tuaj yeem rov ua dua lossis ntsuas yam tsis tau hloov pauv lawv lub xeev, nws ua rau muaj kev nyuaj rau cov neeg phem los cuam tshuam cov ntsiab lus kev sib txuas lus ntawm ob tog yam tsis raug kuaj pom. Vim qhov nyuaj ntawm kev npaj qhov tseeb ib leeg-photon qhov chaw (SPS), feem ntau ntawm quantum key faib (QKD) systems tam sim no tau tsim los ntawm kev txo qis.qhov chaw teebuas simulate ib qho photons, xws li qis siv laser pulses. Txij li cov laser pulses no kuj tseem tsis muaj photons lossis ntau photons, tsuas yog kwv yees li 37% ntawm cov pulses siv hauv lub cev tuaj yeem siv los tsim cov yuam sij ruaj ntseg. Cov kws tshawb fawb Suav tsis ntev los no tau ua tiav cov kev txwv ntawm yav dhau los quantum Key distribution (QKD) system. Lawv tau siv cov khoom siv ib leeg-photon tiag tiag (SPS, uas yog, cov tshuab muaj peev xwm ntawm kev tso tawm ib tus neeg photons ntawm kev thov).
Lub hom phiaj tseem ceeb ntawm cov kws tshawb fawb yog tsim kom muaj lub cev lub cev muaj peev xwm ua kom muaj qhov ci ntsa iab ib qho photons ntawm kev thov, yog li kov yeej cov kev txwv tseem ceeb uas tau ntsib los ntawm cov teeb pom kev tsis muaj zog siv yav dhau los los tsim cov quantum key faib (QKD) systems. Lawv txoj kev cia siab yog tias qhov system no tuaj yeem txhim kho kev ntseeg tau thiab kev ua tau zoo ntawm quantum key faib (QKD) thev naus laus zis, yog li tso lub hauv paus rau nws txoj kev xa mus rau yav tom ntej hauv ib puag ncig tiag tiag. Tam sim no, qhov kev sim tau ua tiav cov txiaj ntsig tau txais txiaj ntsig zoo vim tias lawv cov SPS tau pom tias muaj kev ua haujlwm siab heev thiab nce qhov txiaj ntsig zoo ntawm qhovQKD systemtsim cov yuam sij kev ruaj ntseg. Zuag qhia tag nrho, cov kev tshawb pom no qhia txog lub peev xwm ntawm SPS-based QKD systems, qhia tias lawv qhov kev ua tau zoo tuaj yeem ua tau zoo dua li ntawm WCP-based QKD systems. "Peb tau ua pov thawj thawj zaug tias qhov kev ua tau zoo ntawm QKD raws li SPS tshaj qhov txwv tus nqi ntawm WCP," cov kws tshawb fawb tau hais. Hauv kev xeem QKD ntawm qhov chaw pub dawb hauv nroog channel nrog qhov poob ntawm 14.6 (1.1) dB, peb tau ua tiav qhov kev ruaj ntseg tseem ceeb (SKR) ntawm 1.08 × 10−3 khoom rau ib tus mem tes, uas yog 79% siab dua li qhov tseeb txwv ntawm QKD system raws li lub teeb tsis muaj zog. Txawm li cas los xij, tam sim no, qhov siab tshaj plaws channel poob ntawm SPS-QKD system tseem qis dua li ntawm WCP-QKD system. Qhov kev poob qis qis tau pom los ntawm cov kws tshawb fawb hauv lawv cov quantum tseem ceeb faib (QKD) tsis yog los ntawm lub kaw lus nws tus kheej, tab sis raug ntaus nqi rau qhov seem ntawm cov duab ntau hauv cov txheej txheem tsis pub dawb uas lawv tau khiav. Raws li ib feem ntawm kev tshawb fawb yav tom ntej, lawv cia siab tias yuav txhim kho qhov poob siab ntawm lub kaw lus los ntawm kev ua kom zoo dua qhov kev ua tau zoo ntawm ib leeg-photon qhov chaw (SPS) nyob rau hauv qab txheej ntawm lub kaw lus lossis qhia cov kab nuv ntses rau hauv lub cev. Nws ntseeg tau tias kev nce qib thev naus laus zis txuas ntxiv yuav maj mam txhawb txoj kev loj hlob ntawm quantum tseem ceeb faib (QKD) rau kev siv tswv yim thiab dav siv.
Post lub sij hawm: Jun-25-2025