Toshiba (enye yezinto ezisindayo emhlabeni wezobuchwepheshe) umemezele kuleli sonto ukuthi udlulise ngempumelelo imininingwane ye-quantum ngaphezu kwe-fiber optics 600 km ubude.
Abaphenyi benkampani setha irekhodi elisha lebanga futhi umemezele ikusasa elisha lamanethiwekhi amakhulu we-quantum Bangathumela imininingwane ngokuphepha phakathi kwamadolobha ngisho namazwe. Labo sosayensi bakhombisile ukuthi bangadlulisa izingcezu ze-quantum ngaphezulu kwamakhulu amakhilomitha we-fiber optical ngaphandle kokufaka ikhodi yedatha ye-quantum entekenteke efakwe ezinhlayiyeni.
Ngokusho kwabo, isizathu sokuphumelela kwaso kungenxa yobuchwepheshe obusha obuzinzisa ukuguquguquka kwemvelo okwenzeka ku-fiber. Lokhu kutholakala kungasiza kakhulu ekwenzeni i-intanethi yesizukulwane esilandelayo, ososayensi abanethemba lokuthi ngelinye ilanga bayohamba amabanga omhlaba.
Ukuze ubhekane nezimo ezingazinzile ngaphakathi kwezintambo ezibonakalayo, abacwaningi baseToshiba Basungule inqubo entsha ebizwa ngokuthi 'dual band stabilization'. Le nqubo entsha ithumela amasiginali amabili wereferensi wokukhanya kuma-wavelengths ahlukile, anciphisa i-jitter kumicu emide.
I-wavelength yokuqala isetshenziselwa ukukhansela ukuguquguquka okusheshayo, kuyilapho okwesibili, okunobude obufanayo nobama-qubits optical, kuvumela ukulungiswa kwesigaba.
Abaphenyi ithole ukuthi bekungenzeka ukugcina isigaba se-optical yesiginali ye-quantum engaguquki engxenyeni yobude bemagagasi, ngokunemba kwamashumi ama-nanometer ambalwa, ngisho nangemva kokusakazeka ngamakhulu amakhilomitha we-fiber. Uma lokhu kushintshashintsha kunganxeshezelwa ngesikhathi sangempela, i-fiber iyanwetshwa nezinkontileka ngokuya ngokuhlukahluka kokushisa, okufaka imininingwane ye-quantum.
Una kwezicelo zokuqala zale nqubo emhlabeni wangempela kuzoba ukusatshalaliswa kokhiye be-quantum (QKD) emabangeni amade. Ngokusho kwesikhangiso sabezindaba esikhishwe yiToshiba ngesonto eledlule, izinhlelo ze-QKD ezentengiselwayo okwamanje zikhawulelwe cishe ku-100-200 km we-fiber optics. Ithimba labacwaningi bale nkampani selivele lisebenzise ubuchwepheshe balo ukuhlola i-QKD ebangeni elide.
Isivumelwano uthembele kumanethiwekhi we-quantum ukudala okhiye abaphephile abangakwazi ukugqekezwa, okusho ukuthi abasebenzisi bangashintshana ngokuphepha imininingwane eyimfihlo, njengezitatimende zasebhange noma amarekhodi ezokwelapha, ngesiteshi sokuxhumana esingathembekile, njenge-Intanethi.
“Eminyakeni esanda kwedlula, iQKD ibisetshenziswa ukuvikela amanethiwekhi kamasipala. Le ntuthuko yakamuva inweba ukufinyelela okuphelele kwesixhumanisi se-quantum, ukuze amadolobha akwazi ukuxhunyaniswa kuwo wonke amazwe nasemazwekazini, ngaphandle kokusebenzisa izindawo ezinokwethenjelwa eziphakathi nendawo. Ukusetshenziswa kwe-QKD nge-satellite, kuzosivumela ukuthi sakhe inethiwekhi yezokuxhumana evikelekile emhlabeni wonke, ”kusho u-Andrew Shields, onguMqondisi we-Quantum Technologies eToshiba Europe.
Ngesikhathi sokuxhumana, i- I-QKD isebenza ngokuthi enye yamaqembu amabili ibethele idatha ngokufaka ikhodi ukhiye we-cryptographic kuma-qubits futhi uthumele la ma-qubits kwelinye iqembu ngenethiwekhi ye-quantum. Kodwa-ke, ngenxa yemithetho ye-quantum mechanics, akunakwenzeka ukuthi inhloli ivimbe ama-qubits ngaphandle kokushiya i-evesdrop ebonakalayo kubasebenzisi, abangabe sebethatha izinyathelo zokuvikela imininingwane, ngokusho kwethimba laseToshiba.
Ngokungafani ne-cryptography yakudala, i-QKD ayisuselwa ekuxakekeni kwezibalo kokuxazululwa kokhiye wokuphepha, kepha kusekelwe emithethweni ye-physics. Lokhu kusho ukuthi ngisho namakhompyutha anamandla kakhulu awakwazanga ukugenca okhiye abasuselwa ku-qubit. Ngakho-ke kulula ukubona ukuthi kungani lo mqondo uheha intshisekelo yabadlali bamageyimu abavela kuzo zonke izizinda zempilo, kusuka ezikhungweni zezezimali kuya kuma-ejensi wezobunhloli.
Ucwaningo lukaToshiba luxhaswe ingxenye ethile yi-European Union, kukhombisa intshisekelo enkulu ekwakhiweni kokuxhumana kwe-quantum. Ngasikhathi sinye, uhlelo lwakamuva lwaseChina lweminyaka emihlanu lubeka nokugcizelela okukhethekile kumanethiwekhi we-quantum, kuyilapho i-United States isanda kushicilela uhlelo oluyingqophamlando olubeka umhlahlandlela wesinyathelo nesinyathelo wokusungula i-Intanethi yomhlaba wonke eyi-quantum.
I-intanethi ye-quantum kulindeleke ukuthi inike amandla ukusetshenziswa okungenzeki ngezinhlelo zokusebenza zewebhu zanamuhla Lokhu kusuka kusizukulwane sokuxhumana okungenakuphikiswa kuze kube sekudalweni kwamaqembu amadivayisi we-quantum axhumene, angahlangana, angadlula amandla wekhompyutha wamadivayisi ajwayelekile.
Umthombo: https://www.toshiba.eu
Kufanele ukhohliseke kakhulu ukusho into enjalo. Akukho, futhi ngeke kube khona, akukho okungenakugqekezwa, ngeke kwenzeke ukukukhipha nje, kepha uma othile enentshisekelo yangempela, bazoyifaka ngo-0.5.