Chinese Journal of Lasers, Vol. 47, Issue 9, 0912001 (2020)
Beam Splitting via Non-Hermitian Stimulated Raman Shortcut to Adiabatic Passage
Tang Kai1,3, Hu Zhengfeng2,**, Liu Chengpu3,***, and Chen Xi1,*
- 1Department of Physics, College of Sciences, Shanghai University, Shanghai 200444, China
- 2Key Laboratory of Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences,Shanghai 201800, China
- 3State Key Laboratory for High Laser Field Physics and CAS Center for Excellence in Ultra-Intense Laser Science,Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
For a three-level non-Hermitian quantum system with gain and loss, a new technique called non-Hermitian stimulated Raman shortcut to adiabatic passage (NH-STIRSAP) is proposed. This technique is based on the traditional stimulated Raman adiabatic passage (STIRAP), and the non-Hermitian terms in the NH system can be flexibly manipulated to effectively compensate the nonadiabatic coupling in the evolution and thus to accelerate the whole adiabatic evolution process. The detailed numerical calculation and theoretical analysis results confirm the rapidness and high-fidelity of the proposed technique. In addition, its application in beam splitting is demonstrated. Compared with the traditional shortcuts to adiabaticity, the new NH-STIRSAP technique has a wider range of applications.
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