Helical band geometry for dynamical topology changing

1. A method for creating a dynamical topology changing (DTC) structure for use in quantum computing, the method comprising:

creating and initializing a Majorana pair in a qubit register;

implementing Majorana braiding and forced measurement by physical gates to realize a Clifford group of logical gate operations; and

utilizing twisted depletion to achieve a gate T.

2. The method of claim 1 , further comprising:

employing anyonic state teleportation to teleport quantum information into and out of the DTC structure.

3. The method of claim 1 , wherein the twisted depletion is performed by changing a topology, performing a measurement, and changing the topology again by depleting an electron gas of a twisted geometry.

4. The method of claim 3 , further comprising:

returning the twisted geometry to an initial untwisted state.

5. The method of claim 4 , wherein returning the twisted geometry to the initial untwisted state ensures that there is no unmanageable build up of geometric twisting as the measurement proceeds.

6. The method of claim 1 , further comprising:

rendering an output of quantum computation by a final set of qubit measurements in a topologically protected basis.

7. A method for obtaining a gate T in standard qubit encoding, the method comprising:

performing an anyonic state teleportation of a qubit state partially encoded in a pair of Majorana quasiparticles to a pair of boundaries, each of which carries an Ising charge σ and is part of a topology alterating structure;

applying a twisted depletion gate T to the qubit encoded in the pair of boundaries to transfer quantum information from an ordinary (sing qubit to a twisted Ising qubit; and

performing an anyonic teleportation of a state encoded in the twisted qubit to the initial pair of Majorana quasiparticles, representing an ordinary (sing qubit.

8. The method of claim 7 , wherein performing the anyonic state teleportation comprises executing a protocol for anyonic teleportation into the topology altering structure.

9. The method of claim 7 , wherein performing the anyonic state teleportation comprises executing a protocol for anyonic teleportation out of the topology altering structure.

10. The method of claim 7 , wherein performing the anyonic state teleportation comprises executing a teleportation protocol that includes Majorana interferometry along a twisted (1,−2)-band lying on a surface in an Ising state whose topology is that of a twice punctured torus.

11. The method of claim 10 , wherein the topology altering structure has a longitude and a meridian, and wherein the (1,−2)-band twists twice around the longitude and once around the meridian.

12. A dynamical topology changing (DTC) structure for use in quantum computing, comprising:

a Majorana pair in a qubit register configured using Majorana braiding and forced measurement by physical gates to realize a Clifford group of logical gate operations; and

a gate T formed using twisted depletion, which is capable of being removed from the DTC structure.

13. The DTC structure of claim 12 , further comprising a twisted (1,−2)-band for use in anyonic state teleportation to teleport quantum information into and out of the DTC structure.

14. The DTC structure of claim 13 , wherein the gate T formed using twisted depletion is formed by changing a topology, performing a measurement, and changing the topology again by depleting an electron gas of a twisted geometry.

15. The DTC structure of claim 14 , wherein the gate T formed using twisted depletion, which is capable of being removed from the DTC structure, is removed by returning the twisted geometry to an initial untwisted state.