Nuclear-spin swap extends room-temperature entanglement lifetime up to 240-fold
Researchers in China have extended the lifetime of entanglement in a room-temperature, solid-state system by up to a factor of 240. Led by Shuo Ren and Rui-Jian Liang at the University of Science and Technology of China in Hefei, the team transferred entangled states from the electron spins of solid-state defects to the spins of surrounding atomic nuclei, which are far more resilient to noise.…
Chinese researchers have successfully extended the lifetime of quantum entanglement in a solid-state system from room temperature up to 240 times its normal duration. Led by Shuo Ren and Rui-Jian Liang at the University of Science and Technology of China, the team achieved this by transferring entangled states from the electron spins of defects in the material to the spins of nearby atomic nuclei, which are far more resistant to external noise.
The research, published in Physical Review Letters, could pave the way for more practical quantum technologies that operate at room temperature. By using a SWAP-gate protocol, the researchers were able to transfer entanglement from the electron to the nucleus, where it remained stable for over 240 microseconds, significantly longer than in the electron alone.
This development could enable quantum information to be stored and retrieved more reliably in solid-state systems, expanding the potential applications for quantum sensing and information processing.
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