Speaker: Yang Wang
Affiliation: Instituto de Física Fundamental – CSIC
Date: Tuesday, 2 June 2026 at 12:00
Location: Seminar Room, Serrano 113b
Efficient coherent control and multi-directional release of quantum information are two key challenges to be addressed by any platform eligible for distributed quantum devices. In context of circuit and waveguide quantum electrodynamics, such challenges have to be addressed by developing systems of artificial atoms interconnected through microwave waveguides, working as quantum links, enabling for both noiseless quantum control and chiral photon emission. In this work we introduce a device able to address both challenges at once, by harnessing the new paradigm of artificial giant molecules—systems of interacting artificial atoms. We show how the collective states of the molecule and photon interference can be combined to create single-photon decoherence-free states, which are further used to encode a logical qubit. Through tunable parameters, we also show how to engineer effective chiral emission of a single-photon stored in the molecule, enabling for multi-directional photon control. The flexibility of artificial giant molecules, as demonstrated in this work, opens a broad avenue for new developments and applications beyond quantum information and chiral quantum optics.