Photons, the smallest units of electromagnetic energy, play a crucial role in transmitting information across quantum networks. These photons possess different properties such as path, polarization, and frequency, which can be used to store quantum information.
By entangling photons, techniques like quantum teleportation become possible. However, the connection established through entanglement is highly susceptible to errors caused by environmental factors.
Researchers at Oak Ridge National Laboratory have discovered that hyperentanglement, which involves entangling multiple properties of two photons, can enhance the reliability of communication. They have developed a novel quantum gate that operates based on the polarization and frequency of photons. This innovation, coupled with hyperentanglement, has the potential to minimize errors in quantum communication and facilitate the development of advanced quantum networks.
Hsuan-Hao Lu of ORNL explained, “Consider a photon with horizontal polarization, representing a binary value of zero. As this photon traverses through fiber, its polarization may undergo random changes, leading to communication errors. Through the integration of hyperentanglement, the methodologies we have devised could effectively mitigate these errors during networking tasks.”
The team of researchers has successfully controlled hyperentanglement using a unique quantum gate. This breakthrough is poised to enhance communication capabilities within quantum networks, making them more dependable.
“I am delighted to see our work gaining recognition,” expressed Lu in an interview. “However, there is still more progress to be made for further advancements.”
The next phase of this research involves implementing this cutting-edge technology on ORNL’s existing quantum network.
Journal Reference:
- Hsuan-Hao Lu, Joseph M. Lukens, Muneer Alshowkan, Brian T. Kirby, and Nicholas A. Peters. Building a controlled-NOT gate between polarization and frequency. Optica Quantum. DOI: 10.1364/OPTICAQ.525837
