Preparation of Knill–Lafamme–Milburn states based on superconducting qutrits
Qigong Liu, Qi‐Cheng Wu, Xin Ji · Journal of the Optical Society of America B · 2014
We propose two schemes for generating the Knill–Lafamme–Milburn states of two distant polar molecule ensembles, respectively, in two transmission-line resonators (TLRs) connected by a superconducting charge qutrit (SCQ), and of two SCQs in a TLR, respectively. Both schemes are robust against photon decay due to the virtual excitations of the microwave photons of the TLRs, and the spontaneous emission can be suppressed owing to the virtual transitions of the SCQs in the second scheme. In addition, the schemes have high controllability and feasibility under the current available techniques.