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Patent US10346348
Issued 2019-07-09
Quantum Computing Methods And Devices For Majorana Tetron Qubits
Among the embodiments disclosed herein are example methods for generating all Clifford gates for a system of Majorana Tetron qubits (quasiparticle poisoning protected) given the ability to perform certain 4 Majorana zero mode measurements. Also disclosed herein are example designs for scalable quantum computing architectures that enable the methods for generating the Clifford gates, as well as other operations on the states of MZMs. These designs are configured in such a way as to allow the generation of all the Clifford gates with topological protection and non-Clifford gates (e.g. a π/8-phase gate) without topological protection, thereby producing a computationally universal gate set. Several possible realizations of these architectures are disclosed.
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- 1. A quantum computing device, comprising:
a two-sided Majorana Tetron qubit, comprising:
two topological superconducting nanowires, each of the topological superconducting nanowires having a respective first end at which a respective first Majorana zero mode resides and a respective second end, opposite the first respective end, where a respective second Majorana zero mode resides; and
a superconducting backbone element connected to the two topological superconducting nanowires,
the superconducting backbone element being located between the respective first ends and the respective second ends of the two topological superconductive nanowires.
- 10. A system, comprising:
a linear Majorana Tetron qubit, comprising:
a topological superconducting nanowire partitioned into regions, including:
two MZM topological superconducting regions, each having a respective first end at which a respective first Majorana zero mode resides and a respective second end, opposite the first respective end, where a respective second Majorana zero mode resides; and
an s-wave superconducting region that separates the two MZM topological superconducting regions from one another.
