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Q: Fachverband Quantenoptik und Photonik

Q 65: Quantum Information (Miscellaneous)

Q 65.4: Talk

Friday, March 18, 2022, 11:15–11:30, Q-H12

Engineering Organic Molecules with Long-Lived Quantum Coherence — •Burak Gurlek¹, Vahid Sandoghdar¹, and Diego Martin-Cano² — ¹Max Planck Institute for the Science of Light, Erlangen, Germany — ²Departamento de Físíca Teórica de la Materia Condensada and Condensed Matter Physics Center, Universidad Autónoma de Madrid, Madrid, Spain

Some organic molecules in the solid state offer remarkable coherent properties at liquid helium temperatures and flexibility in their chemical synthesis [1]. However, the excited state associated with the strong Fourier-limited zero-phonon lines of these systems decay within nanoseconds, posing a challenge for practical applications in quantum technologies. In this theoretical work, we propose a new molecular system with quantum coherences up to millisecond time scales. Here, we exploit the inherent optomechanical character of organic molecules in a solid organic crystal [2]. The proposed scheme consists of a single organic molecule in a host matrix with a structured phononic environment. By suppressing phononic decay channels, we realize and exploit long optomechanical coherence times up to milliseconds for storing and retrieving information. We show that the resulting long-lived vibrational states facilitate reaching the strong optomechanical regime at the single photon level. The proposed system shows the promise of organic molecules for achieving unexplored optomechanical phenomena and long-lived quantum memories. References: [1] C. Toninelli et al., Nat. Mater. 20, 1615-1628 (2021). [2] B. Gurlek et al., Phys. Rev. Lett. 127, 123603 (2021).