Tuning the nuclei-induced spin relaxation of localized electrons by the quantum Zeno and anti-Zeno effects

Autor:	Nedelea, V., Leppenen, N. V., Evers, E., Smirnov, D. S., Bayer, M., Greilich, A.
Rok vydání:	2022
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Quantum Physics
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevResearch.5.L032032
Popis:	Quantum measurement back action is fundamentally unavoidable when manipulating electron spins. Here we demonstrate that this back action can be efficiently exploited to tune the spin relaxation of localized electrons induced by the hyperfine interaction. In optical pump-probe experiments, powerful probe pulses suppress the spin relaxation of electrons on Si donors in an InGaAs epilayer due to the quantum Zeno effect. By contrast, an increase of the probe power leads to a speed up of the spin relaxation for electrons in InGaAs quantum dots due to the quantum anti-Zeno effect. The microscopic description shows that the transition between the two regimes occurs when the spin dephasing time is comparable to the probe pulse repetition period. Comment: 6+5 pages, 2+8 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2212.07995 Zobrazit plný text záznamu View this record from Arxiv