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Quantum register based on individual electronic and nuclear spin qubits in diamond.
M V Gurudev Dutt1, L Childress, L Jiang
1Department of Physics, Harvard University, Cambridge, MA 02138, USA.
Summary
Researchers created a controllable quantum register using electron and nuclear spins in diamond at room temperature. This breakthrough enables scalable quantum information systems with long coherence times.
Area of Science:
- Quantum Information Science
- Condensed Matter Physics
- Quantum Computing
Background:
- Identifying isolated quantum systems with long coherence times is crucial for quantum information science.
- Scalable manipulation and coupling of quantum systems remain a key challenge.
Purpose of the Study:
- To demonstrate coherent manipulation of electron and nuclear spins in diamond for quantum information processing.
- To create a controllable quantum register using nitrogen vacancy (NV) color centers.
- To assess the potential for scalable, optically coupled quantum information systems.
Main Methods:
- Utilized optical and microwave radiation for coherent control of electron spins in NV centers.
- Implemented robust initialization of electron and nuclear spin qubits.
- Demonstrated quantum state transfer between electron and nuclear spins at room temperature.
Main Results:
- Achieved robust initialization and arbitrary quantum state transfer between electron and nuclear spin qubits.
- Demonstrated effective isolation of nuclear spin qubits from the electron spin during optical manipulation.
- Observed coherent interactions between individual nuclear spin qubits, showcasing excellent coherence properties.
Conclusions:
- Developed a controllable quantum register based on electron and nuclear spins in diamond.
- Validated the potential of NV centers for scalable quantum information systems.
- Room-temperature operation and demonstrated coherence properties pave the way for practical quantum technologies.
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