Itumanaho rya Quantum rihishe

Itumanaho rya Quantum rihishe

Itumanaho ry’ibanga rya Quantum, rizwi kandi nka quantum key distribution, ni bwo buryo bwonyine bw’itumanaho bwagaragaye ko bufite umutekano usesuye ku rwego rw’ubwenge bw’umuntu muri iki gihe. Inshingano yabwo ni ugukwirakwiza urufunguzo hagati ya Alice na Bob mu buryo butunguranye kugira ngo itumanaho ribe ritekanye.

Uburyo busanzwe bwo gutumanaho mu mutekano ni uguhitamo mbere no gutanga urufunguzo igihe Alice na Bob bahuye, cyangwa kohereza umuntu wihariye kugira ngo azane urufunguzo. Ubu buryo buragoye kandi burahenze, kandi bukunze gukoreshwa mu bihe bidasanzwe nko gutumanaho hagati y’ubwato butwara amazi n’ibirindiro. Gukwirakwiza urufunguzo rwa Quantum bishobora gushyiraho umuyoboro wa quantum hagati ya Alice na Bob, no gutanga urufunguzo mu gihe nyacyo hakurikijwe ibyo bikenewe. Iyo habayeho ibitero cyangwa gushakisha amakuru mu buryo butunguranye mu gihe cyo gutanga urufunguzo, Alice na Bob bombi bashobora kubimenya.

Gukwirakwiza urufunguzo rwa quantum no kubona fotoni imwe ni ikoranabuhanga ry'ingenzi mu itumanaho ritekanye rya quantum. Mu myaka ya vuba aha, za kaminuza zikomeye n'ibigo by'ubushakashatsi byakoze ubushakashatsi bwinshi ku ikoranabuhanga ry'ingenzi mu itumanaho rya quantum.Modulator z'amashanyarazinalaser z'ubugari bw'umurongo mutoByakozwe ku giti cyabyo n’ikigo cyacu byakoreshejwe cyane muri sisitemu yo gukwirakwiza urufunguzo rwa quantum. Fata urugero rw’urufunguzo rwa quantum ruhindagurika nk’urugero, nk’uko bigaragara ku ishusho ikurikira.

Dukurikije amahame yavuzwe haruguru, modulator ya electro-optical (AM, PM) ni igice cy'ingenzi cya sisitemu yo gupima urufunguzo rwa quantum, ifite ubushobozi bwo guhindura imiterere cyangwa icyiciro cy'umurima w'urumuri, kugira ngo ikimenyetso cyinjiye gishobore koherezwa binyuze muri quantum y'urumuri. Sisitemu isaba modulator y'ubukana bw'urumuri kugira igipimo cyo kuzimira kinini no gutakaza bike kugira ngo ikore ikimenyetso cy'urumuri gikozwe mu buryo bwa pulsed ratio yo kuzimira kinini.