Long one dimensional wires are a prerequisite for topological qubits – a form of qubit that is robust against decoherence[1]. Topological qubits utilise Majorana Zero Modes – a quasiparticle that is it’s own antiparticle. A majority of the work done on topological qubits have used one dimensional systems with high disorder[2][3][4]. Disorder masks the signatures of Majorana Zero Modes, making it difficult to form a topological qubit. Quantum Point Contacts are a low disorder one dimensional system – however they are not long. In this work we aim to use a new design to make longer Quantum Point Contacts.
About the presenter
Krittika Kumar is a PhD student at UNSW with CI Alex Hamilton. Her research aims to develop ultra-clean 1D systems for topological quantum states, as part of FLEET’s Research Theme 1, Topological Dissipationless.