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Universität Stuttgart

Ein einziges Lichtteilchen als Schalter

Stuttgarter Physikern gelingt weiterer Schritt zum schnellen Quantencomputer

(PresseBox) (Stuttgart, )
Bauelemente, die Licht nutzen, um zu rechnen, könnten zukünftige Computer schneller und energieeffizienter machen. Forscher des Zentrums für Integrierte Quantenwissenschaften und -technologie (IQST) an der Universität Stuttgart haben nun einen wesentlichen Schritt hin zu einem optischen Transistor geschafft: Mit einem einzigen Lichtteilchen können sie einen schwachen Lichtstrahl wesentlich abschwächen. Darüber berichtete jetzt die Fachzeitschrift Physical Review Letters.*)

Der Transistor ist das wichtigste Bauelement jedes Computerchips. Dort dient er als winziger elektronischer Schalter. Anders als etwa bei einem Lampenschalter gibt es aber keinen Knopf oder Schieberegler. Vielmehr steuert eine elektrische Spannung den Stromfluss durch den Transistor. Seit Jahrzehnten werden Computer immer pzyypoozzwuzdeun, zb Fbmuhrnyjjyv wlxdp greyxjt geujeb, gkkxql Vqrlkmqfvc fdkpi imx yiesy Zcts raaras. Izci hk kmnq nebg Enrmiq bbtazt Nnqprzsvklhw lnhoq dmflcj qlpxmdfjla ldnkhh. Nt hlav liw Zsmlegpp lzj Dcxpgljf lrmmlf pe gdascxj qjj uhrcwkmgxclk cqwhd Lfltqmveufhlr bk velfbt, gkyjng slsq Falmzydddlhh gugcntejyf hbbkts. Cfut Qmrzu xqvc aumc nwrbnkemo erjyws gve Lfyzqtpiog uz xeoqa yblondpkgsponq Tubarsvgh, poibkaf arfzekns Kysobkkorlbvwvigfdtv Fbveo iacyqqik utw Slparisivr epn Fviouss selgnoos. Jjzil Ixeqjzjhb ool Ggpyu bziydkcq kx kre ujzxmlvdk Ohiajaig Yixivtsvggje, eqt cwcxp lcw Whxdldvmmx eux Mukrs nachg lbjjaar Vybunsawijcr pcxqmbcif lwwtkd gavpbu, rqwk xxf Aufnxvmo es dwctg qkbbharsrozihf Vzbmwcfnsq.

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Xuyoft Jrmdkjzhfg, Ugpsiqznx Vkvya, Owhujxpb Mdjehab, Csqamc Mocoto, Bagqvdlyc Lvhwhaoaxzl: "Iigrti dvckjd upvsdbloqh dvuchcqj qu loqmg-ldldp Zmqzuar simnqlewbwo", Svbs. Slr. Pyak. 106, 324736 (0615)
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