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Realization of reliable solid-state quantum memory for photonic polarization qubit
Zong-Quan Zhou1, Wei-Bin Lin, Ming Yang
1Key Laboratory of Quantum Information, University of Science and Technology of China, CAS, Hefei, 230026, China.
Physical Review Letters
|September 26, 2012
Summary
Researchers developed a high-fidelity quantum memory for storing unknown quantum light states. This solid-state device, utilizing an atomic frequency comb, is crucial for advancing quantum communication and computation networks.
Area of Science:
- Quantum Information Science
- Solid-State Physics
- Photonics
Background:
- High-fidelity quantum memory is critical for quantum communication and distributed quantum computation.
- Existing quantum memory solutions face challenges in fidelity and scalability.
Purpose of the Study:
- To demonstrate a compact, solid-state quantum memory device.
- To achieve high-fidelity storage and retrieval of quantum light states.
Main Methods:
- Utilized an atomic frequency comb (AFC) in rare-earth ion-doped crystals.
- Implemented reversible transfer of photonic polarization states into collective atomic excitation.
- Employed single-photon-level coherent pulses for testing.
Main Results:
- Achieved up to 0.999 process fidelity for storage and retrieval.
- Demonstrated a compact, solid-state quantum memory device.
- Successfully transferred photonic polarization states into atomic excitation.
Conclusions:
- The developed quantum memory offers high fidelity, essential for quantum networks.
- This solid-state approach is a significant advancement for quantum communication and computation.
- Reliable quantum memory is a key enabler for future quantum network technologies.
