Zero-Point Energy and Fluctuation in a Field-Josephson Junction-Coupled System

场与约瑟夫森结耦合系统中的零点能和零点涨落(英文)

To investigate the interaction of a mesoscopic Josephson junction with a single mode quantized electromagnetic field, the diagnonalizing process of the coupled system Hamiltonian was performed by using an unitary transformation. Zero? point energy and zero? point fluctuation of the coupled system were shown. For the ground state of the coupled system, the quantum fluctuations of the flux and charge operators in the field and junction subsystems can exhibit smaller quantum noise than the zero point fluctuations of the individual subsystems. Thus, when the coupled system is in its lowest energy state, which means that no radiation appear, the two subsystems exhibit nonclassical behavior.

研究介观约瑟夫森结与量子化电磁场相互作用系统 .用幺正变换技术对耦合系统的哈密顿实施对角化 ,得到耦合系统的零点能和零点涨落 ,显示了场与约瑟夫森结子系统磁通和电荷的基态量子涨落特点 .当耦合系统处于其最低能态 (无辐射状态 ) 。