PhD defense presentation for a general audience on nanowires and nanostructures for topological quantum computing

1. InSb Nanowire Heterostructures
for Topological Quantum Computing
Ghada Badawy

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4. A Facebook data center in Sweden
Nature 561, 163-166 (2018)
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5. A Facebook data center in Sweden
Nature 561, 163-166 (2018)
10% of global electricity supply
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6. A Facebook data center in Sweden
Nature 561, 163-166 (2018)
10% of global electricity supply
3.5% of global carbon emissions
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7. A Facebook data center in Sweden
Nature 561, 163-166 (2018)
10% of global electricity supply
3.5% of global carbon emissions
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8. Quantum Computing
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10. 1
0
Off On
A classical bit can be in one of two states
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11. A classical bit can be in one of two states
1
0
Heads Tails
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12. A quantum bit (qubit) can be in one of two states or both at the same time
1
0
Heads Tails Spinning
0 + 1
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13. Qubits are fragile and hard to control
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14. Qubits are fragile and hard to control
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15. Can we hide the information from the environment?
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16. Topological Quantum Computing
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17. Topological Quantum Computing
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18. Topological Quantum Computing
anyons
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19. Topological Quantum Computing
anyons
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20. Topological Quantum Computing
anyons
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21. Topological Quantum Computing
anyons
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22. Fantastic anyons and where to find them?
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23. +
Engineering the environment for anyons
semiconductor superconductor magnet
+
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24. A semiconducting nanowire
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25. A semiconducting nanowire covered with a superconductor
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26. A semiconducting nanowire covered with a superconductor in a magnetic field
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27. A semiconducting nanowire covered with a superconductor in a magnetic field
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31. Reduce and eliminate imperfections
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32. The semiconducting nanowire
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33. The semiconducting nanowire
1000 x thinner than a human hair
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35. 1 µm
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36. 1 µm
1 µm
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46. Eliminate impurities
1 µm
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47. Add a superconductor
Eliminate impurities
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48. Add a superconductor
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49. 1 µm
200 nm
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50. Eliminate impurities Add a superconductor
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51. Control the interface
Eliminate impurities Add a superconductor
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52. 1 µm
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55. Defects
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56. Defects
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57. Fits perfectly
Defects
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58. 1 µm
Interaction strength
Control the interface
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59. Control the interface
Eliminate impurities Add a superconductor
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