Jakarta, INTI – A major milestone in the field of quantum physics has been achieved by a research team from Nanjing University, China. For the first time in the world, they have successfully demonstrated quantum teleportation of a telecom-wavelength photonic qubit into a solid-state quantum memory. This achievement marks a crucial step toward realizing a quantum internet that can be seamlessly integrated with today’s existing fiber-optic telecommunications infrastructure.
Quantum teleportation is a method of transferring information between particles without physical movement, using the principle of quantum entanglement. With this breakthrough, long-distance quantum communication is closer than ever to becoming a reality.
System Fully Compatible with Fiber Optic Infrastructure
Unlike previous experiments that required frequency conversion to match telecom systems, the teleportation system developed by Professor Xiao-Song Ma’s team operates entirely within the telecom band. This means the system can be directly applied to today’s global fiber-optic networks.
“This compatible platform is highly promising for large-scale quantum networks,” said Ma, as quoted by Phys.org.
In the experiment, the team utilized five fully integrated subsystems:
- Input qubit preparation
- Entangled photon source (EPR source) based on photonic chip
- Bell-state measurement module
- Erbium-ion-based quantum memory
- Frequency stabilization system using Fabry-Pérot cavity and Pound-Drever-Hall technique
Quantum Memory: The Key to Future Quantum Networks
Quantum memory plays a vital role as a quantum repeater in long-distance communication networks. It temporarily stores quantum information until entanglement is established across all segments of the network. This ensures not only faster transmission but also significantly extended communication distances.
“Quantum memory is crucial for extending the transmission range of quantum networks,” added Ma.
A Step Toward a Global Quantum Internet
This groundbreaking achievement has been officially published in the scientific journal Physical Review Letters and is regarded as a key milestone in the development of a global quantum internet.
Moving forward, the research team plans to focus on improving the memory’s storage duration and operational efficiency. If successful, it could pave the way for the practical implementation of quantum internet integrated with existing fiber-optic infrastructure, without the need to rebuild current systems from scratch.
Conclusion:
This successful quantum teleportation experiment to a solid-state memory proves that quantum technology is no longer confined to theory but is entering the realm of real-world application. With a system that is directly compatible with fiber-optic networks, this breakthrough marks a significant leap toward a global era of quantum communication faster, more secure, and highly efficient.
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