Coherent Population Trapping of an Electron Spin in a Single Negatively Charged Quantum Dot

TL;DR

This paper demonstrates coherent population trapping of an electron spin in a single negatively charged quantum dot, advancing control over quantum states in solid-state systems for quantum information applications.

Contribution

It presents the first demonstration of CPT in a single quantum dot electron spin, expanding the understanding of quantum coherence in solid-state qubits.

Findings

CPT observed in a single quantum dot electron spin.

Enhanced control over quantum states in solid-state systems.

Potential applications in quantum information processing.

Abstract

Coherent population trapping (CPT) refers to the steady-state trapping of population in a coherent superposition of two ground states which are coupled by coherent optical fields to an intermediate state in a three-level atomic system. Recently, CPT has been observed in an ensemble of donor bound spins in GaAs and in single nitrogen vacancy centers in diamond by using a fluorescence technique. Here we report the demonstration of CPT of an electron spin in a single quantum dot (QD) charged with one electron.