摘要
The one-and two-particle states in the sinh-Gordon and sine-Gordon models in(1+1)dimensions are investigated by using the gaussian wave-functional approach.We find that(i)the renormalized mass parameter is just the variational one particle mass,and(ii)there are no two-particle bound states in the sinh-Gordon model,but in the sine-Gordon model,there exist two-particle bound states.
基金
Supported by the Science Foundation of The Chinese Education Committee.
