Abstract
By using the density matrix renomalization group (DMRG) method, we investigated the effects of quantum phonon fluctuations and electron correlations on the bond order wave (BOW) and energy gap (EG) of a one-dimensional (1D) half-filling SSH-hubbard model of conjugated polymers at the anti-adiabatic limit. It is shown that a simple linear relation between BOW and EG is kept at U=0 even when the fluctuations are taken into account although the reduction of EG due to the fluctuations is much larger than that of BOW. After considering the Hubbard repulsive interaction we find a dimerized spin-fluid phase when U is larger than a critical value.
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