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Updated: Jan 6, 2026

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
Published on: June 28, 2018
Partial-Wave Resolved Spin-Orbit Dynamics
Wankai Li1, Jingxuan Zhang1, Yang Jin1
1Jilin University, Jilin University, Institute of Atomic and Molecular Physics, 2699 Qianjin Avenue, Changchun City, 130012, China and Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Changchun 130012, China.
Abstract:
A novel projective measurement technique utilizing conventional photoelectron velocity-map imaging to probe the spatial part of the wave function by projecting it into momentum space is demonstrated. Oscillations between the states |m_{l}=0,m_{s}=±1/2⟩ and |m_{l}=±1,m_{s}=∓1/2⟩ are observed with no detectable decoherence over 170 cycles with a speed of around 1.7 THz driven purely by spin-orbit interaction. Our measurements achieve a quantum operation fidelity of approximately 90%, limited by the photoionization detection scheme. This Letter establishes a new platform for high-fidelity quantum operations driven by the intrinsic spin-orbit coupling.
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