Umhlaba weqe umkhawulo wokhiye we-quantum okokuqala ngqa

Umhlaba weqe umkhawulo wokhiye we-quantum okokuqala ngqa. Izinga elingukhiye lomthombo weqiniso we-single-photon lenyuke ngo-79%.

I-Quantum Key Distribution(I-QKD) ubuchwepheshe bokubethela obususelwe ezimisweni zomzimba ze-quantum futhi bubonisa amandla amakhulu ekuthuthukiseni ukuphepha kokuxhumana. Lobu buchwepheshe budlulisa okhiye bokubethela ngokusebenzisa izilinganiso ze-quantum zama-photons noma ezinye izinhlayiya. Njengoba lezi zimo ze-quantum zingenakuphindwaphindwa noma zikalwe ngaphandle kokushintsha izimo zazo, kwandisa kakhulu ubunzima bezinhlangano ezinonya ukuze zibambe okuqukethwe kokuxhumana phakathi kwezinhlangothi zombili ngaphandle kokutholwa. Ngenxa yobunzima bokulungiselela imithombo yeqiniso ye-single-photon (SPS), iningi lezinhlelo ze-quantum key distribution (QKD) ezithuthukisiwe okwamanje zincike ekuncipheni.imithombo yokukhanyaezilingisa ama-photon angawodwa, njengama-low-intensity laser pulses. Njengoba lawa ma-laser pulses angase aqukathe ama-photon noma ama-photon amaningi, cishe kuphela u-37% wamapulse asetshenziswa ohlelweni angasetshenziswa ukukhiqiza okhiye bokuqinisekisa ubunikazi. Abacwaningi baseShayina basanda kunqoba ngempumelelo imikhawulo yohlelo olwaluhlongozwe ngaphambilini lwe-quantum Key distribution (QKD). Basebenzise imithombo yangempela ye-photon eyodwa (i-SPS, okungukuthi, amasistimu akwazi ukukhipha ama-photon ngamanye uma kudingeka).

Umgomo oyinhloko wabacwaningi uwukwakha uhlelo oluphathekayo olukwazi ukukhipha ama-photon angawodwa akhanya kakhulu ngokufunwa, ngaleyo ndlela anqobe imikhawulo eyisisekelo ebhekene nemithombo yokukhanya ebuthaka esetshenziswe esikhathini esidlule ukuze kwakhiwe izinhlelo ze-quantum key distribution (QKD). Ithemba labo ukuthi lolu hlelo lungathuthukisa ukuthembeka nokusebenza kobuchwepheshe bokusabalalisa ukhiye we-quantum (QKD), ngaleyo ndlela lubeke isisekelo sokusatshalaliswa kwalo esikhathini esizayo ezindaweni zomhlaba wangempela. Njengamanje, ukuhlolwa kuzuze imiphumela ethembisayo kakhulu ngoba i-SPS yabo itholakale inekghono eliphezulu kakhulu futhi inyusa kakhulu izingaUhlelo lwe-QKDyakha okhiye bokuvikela. Sekukonke, lokhu okutholakele kugqamisa amandla ezinhlelo ze-QKD ezisekelwe ku-SPS, okubonisa ukuthi ukusebenza kwazo kungadlula kakhulu lokho kwezinhlelo ze-QKD ezisekelwe ku-WCP. "Sibonise okokuqala ukuthi ukusebenza kwe-QKD okusekelwe ku-SPS kweqa umkhawulo wezinga eliyisisekelo le-WCP," kusho abacwaningi. Emkhakheni wokuhlolwa kwe-QKD yesiteshi sedolobha esinendawo ekhululekile ngokulahleka okungu-14.6(1.1) dB, sizuze isilinganiso sokhiye ovikelekile (SKR) esingu-1.08 × 10−3 bits nge-pulse ngayinye, ebesiphezulu ngo-79% kunomkhawulo wangempela wesistimu ye-QKD ngokusekelwe ekukhanyeni okuhambisana kancane. Kodwa-ke, okwamanje, umkhawulo wokulahleka kwesiteshi sohlelo lwe-SPS-QKD kusengaphansi kwalokho kohlelo lwe-WCP-QKD. Ukulahlekelwa kwesiteshi okuphansi okubonwe abacwaningi ohlelweni lwabo lokusabalalisa ukhiye we-quantum (QKD) akuzange kusuke ohlelweni ngokwalo, kodwa kubangelwe umphumela wensalela wezithombe eziningi kuphrothokholi ye-decoy-free ababeyisebenzisa. Njengengxenye yocwaningo lwangomuso, banethemba lokuthuthukisa ukubekezelela ukulahlekelwa kwesistimu ngokuqhubeka nokuthuthukisa ukusebenza komthombo wesithombe esisodwa (i-SPS) ngaphansi kwesendlalelo sesistimu noma ukwethula izimo zokuyenga ohlelweni. Kukholakala ukuthi ukuqhubeka okuqhubekayo kwezobuchwepheshe kuzothuthukisa kancane kancane ukuthuthukiswa kwe-quantum key distribution (QKD) ekusetshenzisweni okungokoqobo nokujwayelekile.