RESEARCH PAPER

LUMOS: Language-Conditioned Imitation Learning with World Models

Iman Nematollahi; Branton DeMoss; Akshay L Chandra; Nick Hawes; Wolfram Burgard; Ingmar Posner

Classification

View four quadrants
Major category
WAMs
Architecture
Pending verification
Prediction paradigm
Other mechanisms
Source review status
Not assigned

Category review. A frozen action-conditioned RSSM supports imagined actor-critic optimization; language-conditioned plans and latent-state inference produce robot behavior during deployment. The described action mechanism is external planning, model-assisted policy optimization, geometric tracking, or video-conditioned control; the source does not establish joint future/action generation or an IDM action decoder. Reading evidence

AT A GLANCE

Contribution

LUMOS trains a language-guided manipulation policy by practicing inside a world model learned from offline robot play. Frozen recurrent dynamics support actor-critic learning with expert-latent matching rewards; hindsight plans and language alignment organize behavior. CALVIN and physical tabletop experiments support this combination, with modest gains over adapted HULC and larger component-ablation losses. Transfer means deployment after learning from that environment’s offline data, without online policy fine-tuning.

Abstract

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Affiliations

University of Freiburg; University of Oxford; University of Technology Nuremberg