Dziko lapansi ladutsa malire a quantum key koyamba

Dziko lapansi ladutsa malire a quantum key kwa nthawi yoyamba. Kuchuluka kwa makiyi a gwero lenileni la single-photon kwakwera ndi 79%.

Kugawa Makiyi a Quantum(QKD) ndi ukadaulo wobisa womwe umagwiritsa ntchito mfundo za quantum physical ndipo umasonyeza kuthekera kwakukulu pakukweza chitetezo cha kulumikizana. Ukadaulo uwu umatumiza makiyi obisa pogwiritsa ntchito ma quantum states a ma photon kapena tinthu tina. Popeza ma quantum states awa sangabwerezedwe kapena kuyezedwa popanda kusintha ma states awo, zimawonjezera kwambiri zovuta kwa magulu oipa kuti aletse zomwe zili pakati pa mbali ziwirizi popanda kuzindikirika. Chifukwa cha vuto lokonzekera magwero enieni a single-photon (SPS), machitidwe ambiri ogawa makiyi a quantum (QKD) omwe apangidwa pakadali pano amadalira pa attenuatedmagwero a kuwalazomwe zimatsanzira ma photon amodzi, monga ma laser pulses otsika mphamvu. Popeza ma laser pulses amenewa sangakhalenso ndi ma photon kapena ma photon angapo, pafupifupi 37% yokha ya ma pulses omwe amagwiritsidwa ntchito mu dongosololi ndi omwe angagwiritsidwe ntchito kupanga makiyi achitetezo. Ofufuza aku China posachedwapa apambana bwino zolepheretsa za dongosolo la quantum Key distribution (QKD) lomwe lidaperekedwa kale. Agwiritsa ntchito magwero enieni a single-photon (SPS, kutanthauza, machitidwe omwe amatha kutulutsa ma photon payekhapayekha akafuna).

Cholinga chachikulu cha ofufuzawa ndikupanga dongosolo lachilengedwe lomwe lingathe kutulutsa ma photon amodzi owala kwambiri pakafunika, motero kuthana ndi zoletsa zazikulu zomwe magwero ofooka a kuwala omwe amagwiritsidwa ntchito kale popanga makina ogawa makiyi a quantum key (QKD). Chiyembekezo chawo ndichakuti dongosololi likhoza kukulitsa kudalirika ndi magwiridwe antchito a ukadaulo wogawa makiyi a quantum key (QKD), potero kukhazikitsa maziko a kufalikira kwake mtsogolo m'malo enieni. Pakadali pano, kuyesaku kwapeza zotsatira zabwino kwambiri chifukwa SPS yawo yapezeka kuti ili ndi magwiridwe antchito apamwamba kwambiri ndipo yawonjezera kwambiri liwiro lomweDongosolo la QKDamapanga makiyi achitetezo. Ponseponse, zomwe zapezekazi zikuwonetsa kuthekera kwa machitidwe a QKD ozikidwa pa SPS, zomwe zikusonyeza kuti magwiridwe antchito awo amatha kupitirira kwambiri a machitidwe a QKD ozikidwa pa WCP. "Tawonetsa koyamba kuti magwiridwe antchito a QKD ozikidwa pa SPS amaposa malire oyambira a WCP," ofufuzawo adatero. Mu mayeso a QKD a njira yaulere ya m'mizinda yokhala ndi kutayika kwa 14.6(1.1) dB, tapeza chiwongola dzanja chotetezeka (SKR) cha 1.08 × 10−3 bits pa pulse, chomwe chinali chokwera ndi 79% kuposa malire enieni a dongosolo la QKD kutengera kuwala kofooka. Komabe, pakadali pano, kutayika kwakukulu kwa njira ya SPS-QKD kudakali kotsika kuposa kwa dongosolo la WCP-QKD. Kutayika kochepa kwa njira komwe ofufuzawo adawona mu dongosolo lawo la quantum key distribution (QKD) sikunachokere ku dongosolo lokha, koma kudachitika chifukwa cha zotsatira zotsalira za multi-photon mu protocol yopanda decoy yomwe anali kuyendetsa. Monga gawo la kafukufuku wamtsogolo, akuyembekeza kuwonjezera kupirira kwa dongosololi mwa kuwongolera magwiridwe antchito a gwero la single-photon (SPS) pansi pa dongosololi kapena kuyika ma nyambo mu dongosololi. Akukhulupirira kuti kupita patsogolo kwaukadaulo kosalekeza kudzalimbikitsa pang'onopang'ono chitukuko cha kugawa kwa makiyi a quantum (QKD) kuti agwiritsidwe ntchito moyenera komanso mwachisawawa.