Hannover 2020 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 46: Nano-Optics (Single Quantum Emitters) II

Q 46.4: Talk

Thursday, March 12, 2020, 14:45–15:00, a310

Creating long lived quantum coherence in organic molecules — Burak Gurlek, Vahid Sandoghdar, and •Diego Martín-Cano — Nano-Optics Division, Max Planck Institute for the Science of Light, Erlangen, Germany.

Polycyclic aromatic hydrocarbons stand out within the select group of solid-state emitters with remarkable coherent properties for quantum processing at optical frequencies [1]. These molecules behave as effective two-level emitters embedded in organic crystals, a property that has been exploited to show fundamental devices and nonclassical states at the level of few photons [1-3]. So far, such demonstrations have mainly focused on the coherent electronic transitions of the molecules because their vibrational levels dissipate at faster time scales and thus behave as incoherent decay channels. In this work, we investigate the vibrations of organic crystals theoretically. Importantly, we show that engineering the phononic environment enables an increase in the coherence of the vibrational levels of embedded molecules by orders of magnitude. This finding holds promise for long quantum storage and unexplored quantum functionalities in these systems. References: [1] B. Kozankiewicz and Michel Orrit, Chem. Soc. Rev. 43, 1029 (2014). [2] D. Wang, H. Kelkar, D. Martin-Cano, T. Utikal, S. Götzinger, V. Sandoghdar, Phys. Rev. X 7, 021014 (2017). [3] D. Wang, et al., Nature Phys. 15, 483 (2019).