Berlin 2024 – scientific programme
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QI: Fachverband Quanteninformation
QI 28: Surface Atom and Color Center Spin Qubits
QI 28.2: Talk
Thursday, March 21, 2024, 15:30–15:45, HFT-FT 131
Theoretical study of entangled-state generation and coherence in atomic spins using electron spin resonance with the scanning tunneling microscope. — Eric Switzer1,2, Jose Reina-Gálvez3, Géza Giedke2, Talat Rahman1, Christoph Wolf3, and •Nicolas Lorente4 — 1University Central Florida, Orlando, Florida — 2DIPC, San Sebastian, Spain — 3QNS, Ewha Womans University, Seoul, Republic of Korea — 4CFM (CSIC-EHU), San Sebastian, Spain
Experimental techniques using pulsed electron spin resonance (ESR) with scanning tunneling microscopy (STM) have uncovered a new method to generate entangled spin states using atomic sites prepared on a substrate [1]. In this work, we demonstrate the use of a newly developed NEGF-derived quantum master equation software [2-5] to model ESR-STM for realistic experimental conditions relevant to atomic-scale qubit systems. We predict changes in measured current on the STM tip within the time domain and correlate patterns in the current with the generation of a non-trivial entangled spin state. We also demonstrate the role of electron dynamics in the sequential regime on the coherence of the entangled state as a function of time. [1] Yu Wang et al. Science 382, 87 (2023) [2] J. Reina-Gálvez et al. Phys. Rev. B 100, 035411 (2019) [3] J. Reina-Gálvez et al. Phys. Rev. B 104, 245435 (2021) [4] J. Reina-Gálvez et al. Phys. Rev. B 107, 235404 (2023) [5] https://github.com/qphensurf/