Speaker
Description
From atomic physics, it is well known that an ensemble of indistinguishable quantum emitters can show intriguing cooperative emission effects like superradiance, which is due to coherent coupling of the emitters to their common electromagnetic environment. Entanglement between the emitters leads to the formation of a giant dipole and hence to a superextensive enhancement of light absorption and emission.
Harnessing such cooperative effects [1] for quantum technology with solid-state nanodevices has been challenging due to fabricational challenges to produce nearly indistinguishable emitters in the right spatial arrangements, and because the solid-state environment in the form of phonons affects inter-emitter entanglement [2,3].
Here, I summarize the state of art in cooperative emission for solid-state devices based on quantum dots. In particular, I present examples for experimental realizations [4], review recent theoretical [2,3] and methodological [5,6] insights on the impact of the phonon environment, and discuss ambiguities in the interpretation of g^(2) photon coincidence signals [1].
[1] Z. X. Koong, M. Cygorek, et al., Sci. Adv. 8, abm8171 (2022)
[2] J. Wiercinski, E. M. Gauger, and M. Cygorek, Phys. Rev. Research 5, 013176 (2023)
[3] J. Wiercinski, M. Cygorek, E. M. Gauger, Phys. Rev. Research 6, 033231 (2024)
[4] D. Hallett, et al., to be published
[5] M. Cygorek, et al., Nat. Phys. 18, 662 (2022)
[6] M. Cygorek, E. M. Gauger, Chem. Phys. 161, 074111 (2024)
