Disentangled Quantum Operation on Majorana Qubits in Qubit Chains
Abstract
We consider quantum logical gates on Majorana qubits implemented in chain structures of ordinary qubits, spins, or pseudospins. We demonstrate that one can implement a two-qubit operation via local manipulations, using an extra coupler spin in a T-junction geometry, so that this coupler spin remains disentangled from the qubit. Furthermore, we identify a set of symmetry operations, which not only allow us to determine the resulting two-qubit gate, but also to demonstrate robustness of the resulting gate to inaccuracies in the manipulations, known for topological quantum computation.
- Publication:
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Soviet Journal of Experimental and Theoretical Physics
- Pub Date:
- December 2019
- DOI:
- 10.1134/S1063776119100212
- Bibcode:
- 2019JETP..129..733M