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

TL;DR

This paper demonstrates room-temperature all-optical control of single-hole spins in solution-grown perovskite quantum dots, enabling scalable quantum information processing without the need for low temperatures.

Contribution

It introduces a method for coherent optical manipulation of single-hole spins in perovskite quantum dots at room temperature, a significant advancement over existing low-temperature systems.

Findings

Successful optical initialization, manipulation, and readout of single-hole spins.

Achieved near-complete quantum-state control at ambient conditions.

Demonstrated spin precession and coherent rotation using femtosecond pulses.

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.