Cluster-state preparation in thermal cavities without single-qubit operation
Zhang Xiaolong, Feng Mang, Kelin Gao · Chinese Physics B · 2008
A potential scheme is proposed for generating cluster states of many atoms in cavity quantum electradynamics (QED), in which an unorthodox encoding is employed with the ground state being qubit |0〉 while two closely spaced upper states being qubit |1〉. Throughout the scheme the cavities can be in thermal states but are only virtually excited. We show how to create the cluster states by performing a two-step but no single-qubit operation. Discussion is also carried out on the experimental feasibility of our scheme.