Optical holonomic single quantum gates with a geometric spin under a zero field
The 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...
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| Veröffentlicht in: | Nature photonics 2017-05, Vol.11 (5), p.309-314 |
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| creator | Sekiguchi, Yuhei Niikura, Naeko Kuroiwa, Ryota Kano, Hiroki Kosaka, Hideo |
| description | The 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 centre 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.
Ground-state spin rotations in a nitrogen–vacancy centre in diamond are manipulated within nanoseconds of a near-resonant light field being applied. Pauli quantum gates are demonstrated using the geometric spin preparation and read-out techniques. |
| doi_str_mv | 10.1038/nphoton.2017.40 |
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Ground-state spin rotations in a nitrogen–vacancy centre in diamond are manipulated within nanoseconds of a near-resonant light field being applied. 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Ground-state spin rotations in a nitrogen–vacancy centre in diamond are manipulated within nanoseconds of a near-resonant light field being applied. Pauli quantum gates are demonstrated using the geometric spin preparation and read-out techniques.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><doi>10.1038/nphoton.2017.40</doi><tpages>6</tpages><orcidid>https://orcid.org/0000-0002-8850-4646</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | 639/766/400/482 639/766/483/2802 Adiabatic Adiabatic flow Applied and Technical Physics Computers Data processing Diamonds Electron spin Fault tolerance Gates Information processing Phase (cyclic) Physics Polarization Polarized light Quantum computers Quantum Physics Repeaters Vacancies |
| title | Optical holonomic single quantum gates with a geometric spin under a zero field |
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