The Realization of Topological Qubits in Many-Sheeted Spacetime

Abstract

Microsoft announced that it has created the first topological quantum computer utilizing topological qubits realized as condensed matter Majorana fermions. The condensed matter Majorana fermions are superpositions of fermions and holes: This breaks fermion number conservation or at least, the superselection rule for fermion number. The hole should correspond to a fermion "somewhere else". The many-sheeted space-time of TGD allows us to understand "somewhere else" as a second space-time sheet, a magnetic monopole flux tube. This leads to a model in which the Majorana Dirac equation is replaced with a description which respects fermion number conservation and super selection rule. TGD also predicts that the hierarchy of Planck constant makes topological superconductivity possible at physiological temperatures: biology would be the basic example.