On Thermal Stability of Topological Qubit in Kitaev's 4D Model
On Thermal Stability of Topological Qubit in Kitaev's 4D Model
We analyse stability of the four-dimensional Kitaev model — a candidate for scalable quantum memory — in finite temperature within the weak coupling Markovian limit. It is shown that, below a critical temperature, certain topological qubit observables X and Z possess relaxation times exponentially long in the size of the …