Recently, EurekAlert, a global science and technology news service website hosted by AAAS (American Association for the Advancement of Science), titled “Disorder Entanglement of 15 Trillions of 'Hot Dance' Atoms”, which reported the research results completed by our teacher Kong Jia in Nature Communications (11:2415 (2020), DOI: 10.1038/s41467-020-15899-1) entitled Measurement-induced, spatially-extended entanglement in a hot, strongly- interacting atomic system.
The report pointed out that scientists used lasers to measure the magnetization intensity caused by the rotating electrons of this hot, disordered atomic gas. The measurement of magnetization intensity is a method to study the collision effect and detect the entanglement characteristics. The researchers observed an unprecedented large-scale entangled state of atoms through this method. The number of entangled atoms is about 100 times the largest reported number of entanglements.
In addition, the researchers also found that these entangled atoms have non-local characteristics, that is, there are entanglements between non-adjacent atoms, and between any two entangled atoms, there may also be thousands of macro, hot, and disordered entangled atoms.
This discovery of hot and disorderly entangled states laid the foundation for ultra-precise magnetic field detection. For example, a new generation of brain magnetometer (brain magnetic field imaging instrument) uses the same hot, high-density atomic gas as the above research to detect the weak magnetic field generated by brain activity.
This new research result confirms that entanglement can be applied to basic research in brain science and neuroscience, and can improve the measurement sensitivity of the sensor system.
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