Continuous-variable quantum optics and resource theory for ultrafast semiconductor spectroscopy

• URL: http://arxiv.org/abs/2306.01550v1
• Date: Fri, 2 Jun 2023 13:56:47 GMT
• Title: Continuous-variable quantum optics and resource theory for ultrafast semiconductor spectroscopy
• Authors: Carolin L\"uders, Franziska Barkhausen, Matthias Pukrop, Elena Rozas, Jan Sperling, Stefan Schumacher, Marc A{\ss}mann
• Abstract summary: We focus on multichannel homodyne detection as a powerful tool to measure the quantum coherence and the full density matrix of a polariton system. By monitoring the temporal decay of quantum coherence in the polariton condensate, we observe coherence times exceeding the nanosecond scale. The combination of tailored resource quantifiers and ultrafast spectroscopy techniques presented here paves the way for future applications of quantum information technologies.
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• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: In this review, we discuss the use of continuous variable spectroscopy techniques for investigating quantum coherence and light-matter interactions in semiconductor systems with ultrafast dynamics. We focus on multichannel homodyne detection as a powerful tool to measure the quantum coherence and the full density matrix of a polariton system. By monitoring the temporal decay of quantum coherence in the polariton condensate, we observe coherence times exceeding the nanosecond scale. Our findings, supported by proof-of-concept experiments and numerical simulations, demonstrate the enhanced resourcefulness of the produced system states for modern quantum protocols. The combination of tailored resource quantifiers and ultrafast spectroscopy techniques presented here paves the way for future applications of quantum information technologies.

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