Room-temperature coherent optical manipulation of single-hole spins in solution-grown perovskite quantum dots

• URL: http://arxiv.org/abs/2208.11614v1
• Date: Wed, 24 Aug 2022 15:32:24 GMT
• Title: Room-temperature coherent optical manipulation of single-hole spins in solution-grown perovskite quantum dots
• Authors: Xuyang Lin, Yaoyao Han, Jingyi Zhu and Kaifeng Wu
• Abstract summary: Current systems either operate at very low temperatures or are difficult to scale-up. Here we report manipulation and readout of single-hole spins in an ensemble of solution-grown CsPbBr3 QDs. These operations accomplish nearly complete quantum-state control of single-hole spins at room temperature.
• Score: 3.5994174958472316
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Manipulation of solid-state spin coherence is an important paradigm for quantum information processing. Current systems either operate at very low temperatures or are difficult to scale-up. Developing low-cost, scalable materials whose spins can be coherently manipulated at room temperature is thus highly-attractive for a sustainable future of quantum information science. Here we report ambient-condition all-optical initialization, manipulation and readout of single-hole spins in an ensemble of solution-grown CsPbBr3 perovskite QDs. Single-hole spins are obtained by sub-picosecond electron scavenging following a circularly-polarized femtosecond-pulse excitation. A transversal magnetic field induces spin precession, and a second off-resonance femtosecond-pulse coherently rotates hole spins via strong light-matter interaction. These operations accomplish nearly complete quantum-state control of single-hole spins at room temperature.

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