BAM! Just Like That: Simple and Efficient Parameter Upcycling for Mixture of Experts - Zhang, Qizhen; Gritsch, Nikolas; Gnaneshwar, Dwaraknath; Guo, Simon; Cairuz, David; Venkitesh, Bharat; Foerster, Jakob; Blunsom, Phil; Ruder, Sebastian; Üstün, Ahmet; Locatelli, Acyr (Advances in Neural Information Processing Systems, 2024)