A Singlet State Generated with SQUIDs in Cavity QED
Lin Xie, Libo Chen, Yongjian Gu · Communications in Theoretical Physics · 2010
We propose a scheme to generate a three-quhit three-level singlet state in cavity QED, by placing three A-type SQUIDs in a single mode cavity. In this scheme, we make use of the interaction between the SQUIDs and cavity filed, and the classical pulses. The cavity fields are in vacuum state during the whole operation processes of creating the entanglement, and there is no quantum information transformation between the SQUIDs and cavity fields. Because of the advantage of the SQUID-cavity system, the quality factor of the cavity is greatly relaxed.