Coherent control and spectroscopy of a semiconductor quantum dot Wigner molecule

• URL: http://arxiv.org/abs/2009.13572v1
• Date: Mon, 28 Sep 2020 18:38:50 GMT
• Title: Coherent control and spectroscopy of a semiconductor quantum dot Wigner molecule
• Authors: J. Corrigan, J. P. Dodson, H. Ekmel Ercan, J. C. Abadillo-Uriel, Brandur Thorgrimsson, T. J. Knapp, Nathan Holman, Thomas McJunkin, Samuel F. Neyens, E. R. MacQuarrie, Ryan H. Foote, L. F. Edge, Mark Friesen, S. N. Coppersmith, and M. A. Eriksson
• Abstract summary: coherent control of eight different resonances in a silicon-based quantum dot has not been realized before. We use qubit readout to perform spectroscopy, revealing a dense set of energy levels with characteristic spacing far smaller than the single-particle energy. By comparing with full configuration interaction calculations, we argue that the dense set of levels arises from Wigner-molecule physics.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Multi-electron semiconductor quantum dots have found wide application in qubits, where they enable readout and enhance polarizability. However, coherent control in such dots has typically been restricted to only the lowest two levels, and such control in the strongly interacting regime has not been realized. Here we report quantum control of eight different resonances in a silicon-based quantum dot. We use qubit readout to perform spectroscopy, revealing a dense set of energy levels with characteristic spacing far smaller than the single-particle energy. By comparing with full configuration interaction calculations, we argue that the dense set of levels arises from Wigner-molecule physics.

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