| Autor: |
Sekiguchi, Yuhei, Niikura, Naeko, Kuroiwa, Ryota, Kano, Hiroki, Kosaka, Hideo |
| Rok vydání: |
2017 |
| Předmět: |
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| Zdroj: |
Nature Photonics 11, 309-314 (2017) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1038/nphoton.2017.40 |
| Popis: |
Realization of fast fault-tolerant quantum gates on a single spin is the core requirement for solid-state quantum-information processing. As polarized light shows geometric interference, spin coherence is also geometrically controlled with light via the spin-orbit interaction. Here, we show that a geometric spin in a degenerate subspace of a spin-1 electronic system under a zero field in a nitrogen vacancy center in diamond allows implementation of optical non-adiabatic holonomic quantum gates. The geometric spin under quasi-resonant light exposure undergoes a cyclic evolution in the spin-orbit space, and acquires a geometric phase or holonomy that results in rotations about an arbitrary axis by any angle defined by the light polarization and detuning. This enables universal holonomic quantum gates with a single operation. We demonstrate a complete set of Pauli quantum gates using the geometric spin preparation and readout techniques. The new scheme opens a path to holonomic quantum computers and repeaters. |
| Databáze: |
arXiv |
| Externí odkaz: |
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