Microcavity-mediated Coupling of Two Distant Semiconductor Qubits
E. Gallardo, L.J. Martinez, A.K. Nowak, H.P. van der Meulen, J.M., Calleja, C. Tejedor, I. Prieto, D. Granados, A.G. Taboada, J.M. Garcia and, P.A. Postigo
TL;DR
This paper demonstrates long-distance coupling between two semiconductor quantum dots mediated by a microcavity, showing controllable interactions crucial for quantum computing applications.
Contribution
It reports the first experimental observation of cavity-mediated coupling between distant quantum dots, advancing solid-state quantum information processing.
Findings
Coupling observed at 1.4 microns distance
Resonant excitation enhances emission of both dots
Coupling strength is controllable via excitation intensity
Abstract
Long distance (1.4 micron) interaction of two different InAs/GaAs quantum dots in a photonic crystal microcavity is observed. Resonant optical excitation in the p-state of any of the quantum dots, results in an increase of the s-state emission of both quantum dots and the cavity mode. The cavity-mediated coupling can be controlled by varying the excitation intensity. These results represent an experimental step towards the realization of quantum logic operations using distant solid state qubits.
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Taxonomy
TopicsMechanical and Optical Resonators · Quantum Information and Cryptography · Quantum and electron transport phenomena