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Generation of atomic cluster states through the cavity input-output process
1Division of Optical Metrology, Korea Research Institute of Standards and Science, Daejeon.
Physical Review Letters
|October 26, 2005
Summary
We present a high-fidelity two-qubit controlled-phase gate for atomic qubits using cavity quantum electrodynamics. This method enables efficient generation of scalable cluster states, even with practical experimental imperfections.
Area of Science:
- Quantum Information Science
- Atomic Physics
- Quantum Computing
Background:
- Implementing robust quantum gates is crucial for scalable quantum computation.
- Atomic qubits offer a promising platform due to their long coherence times and controllability.
Purpose of the Study:
- To propose and analyze a scheme for a high-fidelity two-qubit controlled-phase gate using single atomic qubits.
- To demonstrate the feasibility of generating scalable cluster states with the proposed gate.
Main Methods:
- Utilizing cavity input-output processes and single-photon polarization measurements.
- Analyzing gate performance under realistic experimental imperfections like spontaneous emission and photon loss.
Main Results:
- The proposed scheme achieves nearly ideal success probability and fidelity in principle.
- The gate is shown to be feasible for cluster state generation, meeting scalability criteria despite imperfections.
Conclusions:
- The developed scheme offers a practical and efficient method for entangling atomic qubits.
- This work contributes to the advancement of scalable quantum computing architectures based on atomic systems.