11 citations · 11 across the 1 of their papers we have counts for
3 papers
gr-qc2019
Two-field mimetic gravity revisited and Hamiltonian analysis
Liuyuan Shen, Yunlong Zheng, Mingzhe Li
We revisit the two-field mimetic gravity model with shift symmetries recently proposed in the literature, especially the problems of degrees of freedom and stabilities. We first st…
gr-qc2017★ 11 cited
Direct couplings of mimetic dark matter and their cosmological effects
Liuyuan Shen, Yicen Mou, Yunlong Zheng +1
The original mimetic model was proposed to take the role of dark matter. In this paper we consider possible direct interactions of the mimetic dark matter with other matter in the…
gr-qc2017
On (in)stabilities of perturbations in mimetic models with higher derivatives
Yunlong Zheng, Liuyuan Shen, Yicen Mou +1
Usually when applying the mimetic model to the early universe, higher derivative terms are needed to promote the mimetic field to be dynamical. However such models suffer from the…