New Stu­dy on Quan­tum Tele­por­ta­ti­on published

Rese­ar­chers at the Uni­ver­si­ty of Illi­nois at Urba­na-Cham­paign have recent­ly demons­tra­ted the trans­mis­si­on of Quan­tum Infor­ma­ti­on using sin­gle pho­tons. They achie­ved a 94% fide­li­ty. This was made pos­si­ble by the use of a nano­pho­to­nic plat­form that has the poten­ti­al to signi­fi­cant­ly enhan­ce the effi­ci­en­cy of Quan­tum Com­mu­ni­ca­ti­on. Alt­hough it is known that non­line­ar optics can con­tri­bu­te to impro­ving the relia­bi­li­ty of Quan­tum Com­mu­ni­ca­ti­on Sys­tems, pre­vious attempts often fai­led due to the requi­red light level. To sol­ve this pro­blem, the rese­arch team deve­lo­ped a non­line­ar opti­cal sys­tem based on the nano­pho­to­nic plat­form, which also allows for signi­fi­cant­ly hig­her effi­ci­en­cy even with sin­gle pho­tons.

The use of the nano­pho­to­nic plat­form paves the way for relia­ble and sca­lable Quan­tum Com­mu­ni­ca­ti­on in real-world appli­ca­ti­ons. A chall­enge in Quan­tum Tele­por­ta­ti­on is the so-cal­led mul­ti­pho­ton noi­se, which occurs with all rea­li­stic ent­an­gle­ment sources: Ent­an­gled pho­tons can influence each other, even when they are spa­ti­al­ly sepa­ra­ted. Howe­ver, when they are gene­ra­ted, often more than just one pho­ton pair is pro­du­ced, which leads to ambi­gui­ties in the infor­ma­ti­on trans­mis­si­on – a serious obs­ta­cle for future Quan­tum Net­works. By uti­li­zing non­line­ar optics and pro­ces­ses such as sum-fre­quen­cy gene­ra­ti­on (SFG), this noi­se was redu­ced, and the accu­ra­cy of Quan­tum Tele­por­ta­ti­on was signi­fi­cant­ly impro­ved. The results now pre­sen­ted in a paper mark an important mile­stone on the way to func­tion­al Quan­tum Net­works.

Source refe­ren­ces: https://dailygalaxy.com/2025/04/quantum-teleportation-just-became-reality/; https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.134.16080