QUASAR

The project "QUASAR" ex­plores a promis­ing mi­croar­chi­tec­ture for the re­al­iza­tion of a semiconductor-​based quan­tum proces­sor with high scal­ing po­ten­tial, which has no geo­met­ric scal­ing lim­its and will be re­al­ized by means of in­dus­trial semi­con­duc­tor tech­nol­ogy. Two-​dimensional con­nec­tiv­ity is to be achieved by spin-​coherent "shut­tling" of elec­trons in gate-​defined quan­tum dot struc­tures. Si/SiGe quan­tum wells are used as the tech­no­log­i­cal basis and re­search is car­ried out into their qubit-​relevant prop­er­ties.

For this pur­pose, IHP uses its many years of ex­per­tise and ex­ten­sive in­fra­struc­ture to de­velop SiGe/Si-​based quan­tum ma­te­ri­als which can be di­rectly in­te­grated into today's semi­con­duc­tor tech­nol­ogy. The aim is to un­der­stand the fun­da­men­tal re­la­tion­ships be­tween ma­te­r­ial de­fects and qubit prop­er­ties, which will en­able IHP the ef­fi­cient and sys­tem­atic de­vel­op­ment of SiGe/Si sub­strates suit­able for quan­tum proces­sors. In ad­di­tion, on the basis of its own 200 mm SiGe BiC­MOS tech­nol­ogy IHP is de­vel­op­ing crit­i­cal process mod­ules for the re­al­iza­tion of a spin-​qubit based quan­tum proces­sor in sil­i­con.

Fund­ing

The project is funded by Fed­eral Min­istry of Ed­u­ca­tion and Re­search (BMBF). Fund­ing pro­gram: Quan­tum proces­sors and tech­nolo­gies for quan­tum com­put­ers

Project part­ners

• Re­search Cen­ter Jülich GmbH, Peter Grünberg In­sti­tute, Jülich / Ger­many
• HQS Quan­tum Sim­u­la­tions GmbH, Karl­sruhe / Ger­many
• In­fi­neon Tech­nolo­gies Dres­den GmbH & Co. KG, Dres­den / Ger­many
• Fraun­hofer In­sti­tute for Ap­plied Solid State Physics IAF, Freiburg / Ger­many
• Fraun­hofer In­sti­tute for Pho­tonic Mi­crosys­tems IPMS, Dres­den / Ger­many
• Uni­ver­sity of Kon­stanz, Math­e­mat­ics and Nat­ural Sci­ences Sec­tion - Physics De­part­ment - Chair The­ory of Con­densed Mat­ter and Quan­tum In­for­ma­tion, Kon­stanz / Ger­many
• Uni­ver­sity of Re­gens­burg, Re­gens­burg / Ger­many