2018/05/14 by Kazuyuki Kuroyama, Marcus Larsson, C. Y. Chang +13
Computer Science · Physics and Astronomy · #Atomic physics #Condensed matter physics #Magnetic field #Photon #Physics #Quantum #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Qubit #Semiconductor Quantum Structures and Devices #Spin (aerodynamics) #Zeeman effect #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.99.085203
published as Phys. Rev. B 99, 085203 (2019)
arxiv created 2018/05/14 · openalex created_date 2018/05/17 · openalex publication_date 2019/02/07 · arxiv updated 2019/02/13 · openalex updated_date 2026/08/06
Quantum state transfer from a single photon to a single electron following selection rules can only occur for a spin-resolved light-hole excitation in GaAs quantum dots; however, these phenomena have yet to be experimentally realized. Here, we report on single-shot readout of a single electron spin via the Zeeman-resolved light-hole excitation using an optical spin blockade method in a GaAs quantum dot and a Pauli spin blockade method in a double GaAs quantum dot. The observed photoexcitation probability strongly depends on the photon polarization, an indication of angular momentum transfer from a single photon to an electron. Our demonstration will open a pathway to further investigation of fundamental quantum physics and applications of quantum networking technology.