Preparation of Schrodinger cat states of a cavity field via coupling to a SQUID-based charge qubit
Yu-xi Liu, L. F. Wei, Franco Nori · arXiv (Cornell University) · 2004
Based on the measurement of charge states, we show that the superpositions of two macroscopically distinguishable coherent states (Schr\\"odinger cat states) of a single-mode cavity field can be generated by a controllable interaction between a cavity field and a SQUID-based charge qubit. After such cat states of the cavity field are created, the interaction can be switched off by the classical magnetic field through the SQUID, and there is no information transfer between the cavity field and the charge qubit. We also discuss the generation of superpositions of two squeezed coherent states.