Ihlabathi liphule umda wesitshixo se-quantum okokuqala

Ihlabathi liphule umda wesitshixo se-quantum okokuqala. Izinga eliphambili lomthombo wenyaniso we-photon enye linyuke nge-79%.

I-Quantum Key Distribution(I-QKD) bubuchwephesha bokufihlwa obusekwe kwimigaqo ye-quantum yomzimba kwaye ibonisa amandla amakhulu ekwandiseni ukhuseleko lonxibelelwano. Le teknoloji ihambisa izitshixo ze-encryption ngokusebenzisa i-quantum states yeefotoni okanye amanye amasuntswana. Kuba la mazwe e-quantum akanakuphinda-phinda okanye alinganiswe ngaphandle kokutshintsha amazwe abo, kwandisa kakhulu ubunzima kumaqela akhohlakeleyo ukuba athintele umxholo wonxibelelwano phakathi kwamacala amabini ngaphandle kokubhaqwa. Ngenxa yobunzima bokulungiselela imithombo yokwenyani ye-photon-photon (SPS), uninzi lweenkqubo zokusasaza isitshixo se-quantum (QKD) ngoku eziphuhlisiwe zithembele ekunciphiseni.imithombo yokukhanyaezilinganisa iiphoton enye, ezifana ne-low-intensity laser pulses. Kuba ezi pulses zelaser zisenokuqulatha iiphotoni okanye iiphotoni ezininzi, kuphela malunga ne37% yepulse esetyenziswa kwisistim enokusetyenziswa ukwenza izitshixo zokhuseleko. Abaphandi baseTshayina basanda kunqoba ngempumelelo imida yenkqubo ecetywayo ngaphambili ye-quantum Key distribution (QKD). Basebenzise imithombo yokwenyani yefotoni enye (SPS, oko kukuthi, iinkqubo ezikwaziyo ukukhupha iifotoni zomntu ngamnye xa zifunwa).

Injongo ephambili yabaphandi kukwakha inkqubo yomzimba ekwazi ukukhupha ukukhanya okuphezulu kweefotoni enye kwimfuno, ngaloo ndlela iphumelele imida esisiseko ejongene nemithombo yokukhanya ebuthathaka esetyenziswe kwixesha elidlulileyo ukwakha iinkqubo ze-quantum key distribution (QKD). Ithemba labo kukuba le nkqubo inokunyusa ukuthembeka kunye nokusebenza kweteknoloji ye-quantum key distribution (QKD), ngaloo ndlela ibeka isiseko sokusasazwa kwayo kwixesha elizayo kwiindawo zangempela zehlabathi. Okwangoku, uvavanyo lufumene iziphumo ezithembisayo ngenxa yokuba i-SPS yabo ifunyenwe inokusebenza okuphezulu kakhulu kwaye yonyusa kakhulu isantyaInkqubo ye-QKDyenza izitshixo zokhuseleko. Ngokubanzi, ezi zinto zifunyanisiweyo ziqaqambisa amandla eenkqubo ze-QKD ezisekwe kwi-SPS, ezibonisa ukuba ukusebenza kwazo kunokodlula kakhulu ezo nkqubo ze-QKD ezisekwe kwi-WCP. "Sibonise okokuqala ukuba ukusebenza kwe-QKD esekelwe kwi-SPS kudlula umyinge wezinga elisisiseko se-WCP," abaphandi bathi. Kwintsimi yovavanyo lwe-QKD ye-free-space yeshaneli yasezidolophini kunye nokulahlekelwa kwe-14.6 (1.1) dB, siphumelele umlinganiselo okhuselekileyo okhuselekileyo (SKR) we-1.08 × 10-3 bits nge-pulse, eyayiyi-79% ephezulu kunomda wangempela wenkqubo ye-QKD ngokusekelwe ekukhanyeni okuhambelanayo okubuthathaka. Nangona kunjalo, okwangoku, eyona lahleko inkulu yetshaneli yenkqubo ye-SPS-QKD isengaphantsi kunenkqubo ye-WCP-QKD. Ilahleko yeshaneli esezantsi ejongwe ngabaphandi kwinkqubo yabo yokusasazwa kwe-quantum key (QKD) ayizange isuke kwinkqubo ngokwayo, kodwa ibalelwa kumphumo oshiyekileyo weefotoni ezininzi kwiprotocol engena-decoy ababeyiqhuba. Njengenxalenye yophando lwexesha elizayo, banethemba lokuphucula ukunyamezela kokulahlekelwa kwenkqubo ngokuqhubeka nokuphucula ukusebenza komthombo we-photon-single-photon (SPS) kwinqanaba elisezantsi lenkqubo okanye ukuzisa i-bait states kwinkqubo. Kukholelwa ukuba inkqubela phambili yeteknoloji iya kukhuthaza ngokuthe ngcembe uphuhliso lwe-quantum key distribution (QKD) ngokubhekiselele kwizicelo ezisebenzayo kunye neziqhelekileyo.