AI Article Synopsis
- - The text discusses a conflict between optical spin rotations and measurement transitions in quantum dots, a challenge for quantum information technologies.
- - The authors propose a solution using a specific trion configuration with one hole in an excited state, leveraging strong spin-orbit interaction to tilt the spin.
- - This approach enables efficient hole spin initialization and coherent population trapping while maintaining strong spin preservation, allowing for quick optical control and accurate spin measurement.
Article Abstract
Optical spin rotations and cycling transitions for measurement are normally incompatible in quantum dots, presenting a fundamental problem for quantum information applications. Here we show that for a hole spin this problem can be addressed using a trion with one hole in an excited orbital, where strong spin-orbit interaction tilts the spin. Then, a particular trion triplet forms a double Λ system, even in a Faraday magnetic field, which we use to demonstrate fast hole spin initialization and coherent population trapping. The lowest trion transitions still strongly preserve spin, thus combining fast optical spin control with cycling transitions for spin readout.
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| http://dx.doi.org/10.1103/PhysRevLett.126.107401 | DOI Listing |
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