Nano-photoluminescence of magneto-electrons and topological quantum gates

Using high-spatial resolution scanning magneto-photoluminescence (PL) of InP/GaInP2 quantum dots (QDs) we revealed a formation of fractionally charged magneto-electron (em) – a localized particle, consisting of a few magnetic flux quanta self-generated by a single electron. It can be considered as a single particle version of composite fermions involved in fractional quantum Hall effect (FQHE) and used for realization of topological quantum computing schemes. Using six electron QD we demonstrate optically induced pairing (fusion) and interchange (braiding) of ems, which are the necessary steps in the operation of the topological quantum gate.