Following the primordial perturbations through a bounce with AdS/CFT correspondence Lei Ming, Taifan Zheng and Yeuk-Kwan E. Cheung Eur. Phys. J. C, 78 9 (2018) 761 Published online: 21 September 2018 DOI: 10.1140/epjc/s10052-018-6228-8