High fidelity Bell states are synthesized within a single photon. Here, polarization acts as the target chiku bit and the frequency as the controlled chiku bit. Credit: Ornl, US Department of Energy
Recent research, led by quantum researchers at the Department of Energy’s Oak Ridge National Laboratory, has proven popular among the scientific community interested in building more reliable quantum networks.
The study, led by Ornl’s Hsuan-Hao Lu, details the development of a new quantum gate that operates between two photonic degrees of freedom: polarization and frequency. (Photonic degrees of freedom describe the various properties of photons that can be used to control information and store or transmit information.) When combined with hyperparting, this new approach is an error in quantum communication. can increase resilience and pave the way for future quantum networks.
Their work was published in Optica Quantum magazine.
“Photons, the smallest packets of electromagnetic energy, are viable carriers of information across quantum networks,” says Lu. “Each photon has multiple degrees of freedom, such as pathways, polarizations, and frequencies, which can carry quantum information. Quantum connections between photons, known as entanglements, allow for protocols like quantum teleportation. However, this connection is very sensitive to environmental conditions. You can introduce errors during transmission.
Through hyperparting, a multi-degree-of-freedom intertwining between two photons, Lu and his team decided that communication could be more reliably shared.
“For example, imagine there are photons that are horizontally polarized corresponding to a communication bit value of zero. When moved through the fiber, the polarization could change randomly and introduce errors in the communication. “Lu says. “The techniques developed here, when combined with hyperparting, can suppress these errors in network tasks.”
Researchers on this project have established that this hyperpartment can be manipulated through new quantum gates and used in applications, namely improving the ability to communicate over quantum networks. did.
Lu’s work is complemented by his ORNL colleague Alex Miloshevsky entitled “CMOS Photonic Integrated Source of Broadband Polarization Extension Source.” Miloshevsky’s paper was also featured in the Optica Quantum.
The next step in this research is to deploy this new technology into ORNL quantum networks.
Details: Hsuan-Hao Lu et al, constructing an uncontrolled gate between polarization and frequency, Optica Quantum (2024). doi:10.1364/opticaq.525837
Alexander Miloshevsky et al, CMOS Photonic Integrated Source of Broadband Polarized Extended Photons, Optica Quantum (2024). doi:10.1364/opticaq.521418
Provided by Oak Ridge National Laboratory
Citation: Researchers recalled the first Quantum Gate recovered on February 5, 2025 from https://phys.org/news/2025-02-02-kind-quantum-gate.html on February 5, 2025 (2025, February 5th) will be developed.
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