Sol­id-state pho­ton­ic quan­tum sys­tems have matured dra­mat­i­cal­ly, and time is now mature to merge small-scale quan­tum sys­tems into larg­er quan­tum archi­tec­tures for advanced func­tion­al­i­ties. We exploit sin­gle quan­tum dots embed­ded in pho­ton­ic nanos­truc­tures as qubits for quan­­tum-infor­­ma­­tion pro­cess­ing. Recent high­lights include the demon­stra­tion of sin­­gle-pho­­ton switch­ing con­trolled by a sin­gle spin chi­ral pho­­ton-emit­ter cou­pling. The plat­form is con­sid­ered a promis­ing path­way to on-demand mul­ti-pho­­ton entan­gle­ment gen­er­a­tion and deter­min­is­tic quan­tum gates for quan­­tum-infor­­ma­­tion pro­cess­ing appli­ca­tions We cur­rent­ly have an open­ing for a 2 year (with pos­si­bil­i­ty of exten­sion) post­doc posi­tion in the Quan­tum Pho­ton­ics Group at the Niels Bohr Insti­tute. The project is embed­ded in the Cen­ter of Excel­lence Hybrid Quan­tum Net­works Hy‑Q and the EU Quan­tum Inter­net Alliance.
The project con­cerns exper­i­men­tal gen­er­a­tion of mul­ti-pho­­ton entan­gled states by coher­ent­ly cou­pling and con­trol­ling a sin­gle spin in a quan­tum dot embed­ded in a wave­guide. Pio­neer­ing work on quan­tum dots in bulk sam­ples [Sci­ence 354, 434 (2016)] has shown the excit­ing poten­tial of this approach. Fol­low­ing recent the­o­ret­i­cal pro­pos­als [Phys. Rev X 7, 041023 (2017)], we intend to gen­er­ate on-demand all-pho­­ton­ic quan­tum repeater states.

For fur­ther infor­ma­tion, please con­tact Prof. Peter Lodahl: lodahl@nbi.ku.dk