For a system, Hamiltonian is invariant under any translation of spatial coordinates.对于一体系, 哈密算符在任何空间坐标变换下是不变的.Aim The Hamiltonian is transformed from Pauli matrices to Hubbard operators.目的把用Pauli矩阵表示的哈密顿量转化成用Hubbard算符表示....
Buying budget-priced furniture needn't mean compromising on quality or style.买价钱经济的家具并不意味着就要牺牲质量和样式。The shops also offer a keenly priced curtain-making service.这些商店也提供价格优惠的窗帘制作服务。The merchandise is reasonably priced...