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Experimental realization of a multiplexed quantum memory with 225 individually accessible memory cells
1Center for Quantum Information, IIIS, Tsinghua University, Beijing 100084, China.
Nature Communications
|May 9, 2017
Summary
Researchers developed a multiplexed quantum memory with 225 individually accessible cells for long-distance quantum communication. This breakthrough enables storing and retrieving entangled quantum information with high fidelity, advancing quantum networks.
Area of Science:
- Quantum Information Science
- Atomic Physics
- Quantum Communication
Background:
- Long-distance quantum communication and quantum networks require multiplexed quantum memory with numerous, individually addressable cells.
- Current quantum memory technologies face challenges in scalability and independent cell access.
Purpose of the Study:
- To experimentally realize a multiplexed quantum memory with a large number of individually accessible memory cells.
- To demonstrate the storage and retrieval of entanglement with flying optical qubits in such a memory system.
Main Methods:
- Utilized a macroscopic atomic ensemble to create a multiplexed Duan-Lukin-Cirac-Zoller (DLCZ)-type quantum memory.
- Implemented a system with 225 individually addressable memory cells.
- Demonstrated programmable control over the addressing and readout of stored quantum information.
Main Results:
- Successfully created a multiplexed quantum memory with 225 individually accessible cells.
- Achieved high-fidelity storage and retrieval of entanglement between flying optical qubits and memory cells.
- Showcased programmable delay for quantum information readout.
Conclusions:
- The experimental realization of a scalable, multiplexed quantum memory is a significant advancement for quantum information technology.
- Programmable control over memory cell addressing and readout is crucial for practical quantum repeaters and networks.
- This work paves the way for building robust long-distance quantum communication systems.
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