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►【[理论室报告]/[Theory Lab seminar]】

Title：Collectively prohibited spontaneous emission in 1D subwavelength atom array

Time：Mar. 29(Tuesday), 2022, 15:00 

Speaker：Dr. Yuxiang Zhang, Niels Bohr Institute

Place：Online

Abstract：If the separation between two atoms is shorter than the resonant wavelength, the light-mediated resonant dipole-dipole interaction (RDDI) will be significant. RDDI is usually long-range, dissipative, and lead to phenomena such as super and sub-radiance. For different light fields, such as the real space electromagnetic field or field engineered by photonic devices, RDDI could have completely different forms. However, in 1D atom arrays with a few atomic excitations, we show that some properties are generic (under some loose conditions) regardless of the underlying light fields. This includes a power-law scaling of the decay rate of the subradiant states, and multiply-excited states interpreted as Jordan-Wigner fermions or Tonks-Girardeau bosons.

About the Speaker：Dr. Yu-Xiang Zhang obtained his bachelor at the School of Gifted Young (00 class) of the University of Science and Technology of China in 2012, and received the PhD degree in quantum information science from the same university in 2016. Then he works as postdoc in Aarhus University and the Niels Bohr Institute of the Copenhagen University till now. He works in the field of quantum information and quantum optics.