Experimental Analysis of Energy Transfers between a Quantum Emitter and Light Fields

Energy can be transferred between two quantum systems in two forms: unitary energy-that can be used to drive another system-and correlation energy-that reflects past correlations. We propose and implement experimental protocols to access these energy transfers in interactions between a quantum emitt...

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Bibliographic Details
Published in:Physical review letters 2023-12, Vol.131 (26), p.260401-260401, Article 260401
Main Authors: Maillette de Buy Wenniger, I, Thomas, S E, Maffei, M, Wein, S C, Pont, M, Belabas, N, Prasad, S, Harouri, A, Lemaître, A, Sagnes, I, Somaschi, N, Auffèves, A, Senellart, P
Format: Article
Language:English
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Summary:Energy can be transferred between two quantum systems in two forms: unitary energy-that can be used to drive another system-and correlation energy-that reflects past correlations. We propose and implement experimental protocols to access these energy transfers in interactions between a quantum emitter and light fields. Upon spontaneous emission, we measure the unitary energy transfer from the emitter to the light field and show that it never exceeds half the total energy transfer and is reduced when introducing decoherence. We then study the interference of the emitted field and a coherent laser field at a beam splitter and show that the nature of the energy transfer quantitatively depends on the quantum purity of the emitted field.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.131.260401