采用Peaker变分法,研究具有束缚势的无限深量子阱中量子比特及其声子效应.量子阱中这样的二能级体系可作为一个量子比特.当阱中电子处于基态和第一激发态的叠加态时,电子的概率密度在空间作周期性震荡,得出了振荡周期随耦合强度的增加而减小,随振动频率的增加而增大. The Peaker variational method is used to study the quantum bit and its phonon effect in a boundless quantum well with infinite potential. Such a two-level quantum well system can be used as a quantum bit. When the trap electron is in the ground state and the first excited state , The probability density of electrons periodically oscillates in space. It is found that the oscillation period decreases with the increase of coupling strength and increases with the increase of vibration frequency.