摘要Multi-site compact-like discrete breathers in discrete one-dimensional monatomic chains are investigated by discussing a generalized discrete one-dimensional monatomic model. We obtain that the two-site compact-like discrete breathers with codes σ ={ 0,... ,0,1,1,0,... ,0} and codes σ={0,... , 0,1,-1,0,... ,0} can exist in discrete one-dimensional monatomic chain with quartic on-site and inter-site potentials. However, the former can only exist in hard quartic on-site potential and cannot exist in soft quartic on-site potential, whereas the latter is just reversed. All of the two-site Compact-like discrete breathers with codes σ.={0,....,0,1,1,0,.... ,0} and σ ={0,... , 0,1,-1,0, .... ,0} cannot exist in a pure K4 chain.
Abstract：Multi-site compact-like discrete breathers in discrete one-dimensional monatomic chains are investigated by discussing a generalized discrete one-dimensional monatomic model. We obtain that the two-site compact-like discrete breathers with codes σ ={ 0,... ,0,1,1,0,... ,0} and codes σ={0,... , 0,1,-1,0,... ,0} can exist in discrete one-dimensional monatomic chain with quartic on-site and inter-site potentials. However, the former can only exist in hard quartic on-site potential and cannot exist in soft quartic on-site potential, whereas the latter is just reversed. All of the two-site Compact-like discrete breathers with codes σ.={0,....,0,1,1,0,.... ,0} and σ ={0,... , 0,1,-1,0, .... ,0} cannot exist in a pure K4 chain.
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