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High-Fidelity Control and Entanglement of Rydberg-Atom Qubits
Harry Levine1, Alexander Keesling1, Ahmed Omran1
1Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
Physical Review Letters
|October 9, 2018
Summary
We improved quantum control for Rydberg atoms, enhancing qubit coherence and entanglement fidelity. This breakthrough advances neutral atom quantum simulation and computation.
Area of Science:
- Quantum Information Science
- Atomic Physics
- Quantum Computing
Background:
- Neutral atoms in Rydberg states are promising for quantum technologies.
- Limitations include short coherence times and low gate fidelities.
Purpose of the Study:
- To achieve high-fidelity quantum control of Rydberg-atom qubits.
- To improve coherence properties and entanglement in multi-atom systems.
Main Methods:
- Reduced laser phase noise for enhanced qubit control.
- Prepared two-atom entangled states.
- Applied dynamical decoupling protocols for extended lifetime.
Main Results:
- Significant improvement in coherence properties of individual Rydberg qubits.
- Achieved two-atom entanglement fidelity exceeding 0.97(3).
- Extended the lifetime of entangled states.
Conclusions:
- High-fidelity quantum control of Rydberg atoms is demonstrated.
- Advances pave the way for scalable neutral atom quantum simulation and computation.
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